R. G. Bury’s translations of Sextus Empiricus for the Loeb Library have served English language readers well, but new translations, taking account of advances in scholarship since Bury’s day, have long been needed. We now have two new English versions of the Outlines of Pyrrhonism. They take different and in some ways complementary approaches to the task.

When experimental participants are given the chance to reflect and revise their initial judgments in a dynamic conversational context, do their responses to philosophical scenarios differ from responses to those same scenarios presented in a traditional static survey? In three experiments comparing responses given in conversational contexts with responses to traditional static surveys, we find no consistent evidence that responses differ in these different formats. This aligns with recent findings that various manipulations of reflectiveness have no effect on participants’ judgments (...) about philosophical scenarios. Although we did not find a consistent quantitative effect of format (conversation vs. static survey), conversational experiments still provide qualitative insights into debates about how participants are understanding (or misunderstanding) the scenarios they read in experimental studies, whether they are replacing difficult questions with questions that are more easily answered, and how participants are imagining the scenarios they read in ways that differ from what is explicitly stated by experimenters. We argue that conversational experiments—"Socratic questionnaires"—help show what is going on “under the hood” of traditional survey designs in the experimental investigation of philosophical questions. (shrink)

E=mc 2 is found to be a special case ofE=σ ±1cn, where σ is any one of four susceptibilities, namely electric, magnetic, gravitational, and elastic. Letl be length,t time,Δt time dilation, andΔl a measure of Fitzgerald-Lorentz contraction. A particle is stated to be the manifestation of a collection of susceptibilities which arise when(Δl)/1=(Δt)/t. Then(ΔE)/E=5 (Δt)/2t=±(Δσ)/σ. Corresponding to susceptibility, special energy particles are postulated which exhibitSU(3) symmetry, Related to the susceptibilities are five new Heisenberg uncertainty relations. Three new conservation laws for (...) particles are proposed. (shrink)

Among the quantificational notions neglected by classical logic are "many," "few," and "nearly all." Despite the apparent vagueness associated with these terms in ordinary discourse, in specific contexts we can and do draw strict inferences from statements in which they occur. In this pioneering work, Altham has attempted to uncover something of the formal logic that justifies such inferences. He begins by showing the mutual interdefinability of the three terms. If negation and any one of them are taken as primitive, (...) the other two are definable in terms of these. Selecting as his basic semantic notion the idea of a manifold or many-membered-set, he shows it is only necessary to fix upon a number n, greater than one, to represent the least number of elements to constitute a specific manifold and then one can construct a natural deductive system which uses the standard predicate logic. He develops at great length a weak system that yields principles of inference which are valid in every non-empty domain and in which the classical predicate logic appears as a limiting case. One point that emerges is that the three plurality operators may all be exhibited as involving a double quantification not characteristic of "some," "none," or "all." Next, two stronger systems are developed more briefly which are valid only in many-membered domains. The strongest can represent the largest set of informal arguments and seems to be the most natural of the three. Nevertheless, since these three systems admittedly do not give an exhaustive account of the use of these quantifiers in informal discourse, Altham explains three further systems which correspond more closely to the natural language use of these terms. Finally an appendix indicates what modifications would be required for an intuitionistic logic like Heyting's or the minimal logic of Kolmogorov-Johansson. The text is clearly written and requires no greater logical sophistication to understand than would be needed to follow Lemmon's Beginning Logic or Mates' Elementary Logic.--A. B. W. (shrink)

Evolutionary changes in traits that affect both ecological divergence and mating signals could lead to reproductive isolation and the formation of new species. Insect cuticular hydrocarbons (CHCs) are potential examples of such dual traits. They form a waxy layer on the cuticle of the insect to maintain water balance and prevent desiccation, while also acting as signaling molecules in mate recognition and chemical communication. Because the synthesis of these hydrocarbons in insect oenocytes occurs through a common biochemical pathway, natural or (...) sexual selection on one role may affect the other. In this review, we explore how ecological divergence in insect CHCs can lead to divergence in mating signals and reproductive isolation. We suggest that the evolution of insect CHCs may be ripe models for understanding ecological speciation. (shrink)

Previous research in North America has supported the view that male involvement in committed, romantic relationships is associated with lower testosterone (T) levels. Here, we test the prediction that undergraduate men involved in committed, romantic relationships (paired) will have lower T levels than men not involved in such relationships (unpaired). Further, we also test whether these differences are more apparent in samples collected later, rather than earlier, in the day. For this study, 107 undergraduate men filled out a questionnaire and (...) collected one saliva sample (from which a subject’s T level was measured) at various times across the day. As in previous studies, men involved in committed, romantic relationships had lower salivary T levels, though only during later times of the day. Furthermore, additional analysis of the variation among unpaired subjects indicated that men without prior relationship experience had lower T levels than experienced men. Finally, while paired men as a group had lower T levels than unpaired men, those men at the earliest stage (less than six months) of a current relationship had higher T levels than unpaired men as well as men in longer-term relationships. These results suggest that variation in male testosterone levels may reflect differential behavioral allocation to mating effort. (shrink)

Nonhuman primates don’t have formal kinship systems, but genetic relatedness shapes patterns of residence, behavior, mating preferences, and cognition in the primate order. The goal of this article is to provide insight about the ancestral foundations on which the first human kinship systems were built. In order for evolution to favor nepotistic biases in behavior, individuals need to have opportunities to interact with their relatives and to be able to identify them. Both these requirements impose constraints on the evolution of (...) kinship bonds in primate species. For nonhuman primates and many other mammals, maternal care generates close ties between mothers and offspring and among littermates. For species in which mother–offspring bonds extend beyond weaning, associations with the mother also generate familiarity among siblings of different ages. For species with female philopatry, mother–offspring ties provide the foundation for lifelong relationships between mothers and daughters, and dense matrilineal kin networks. However, several factors constrain the development of kinship bonds in nonhuman primates. First, dispersal strategies, which are designed to reduce inbreeding, bias kinship networks in favor of the philopatric sex. Second, hostile relationships between groups mean that kin ties are usually severed when individuals move from one group to another. Third, in species with polygynandrous mating systems, uncertainty about paternity and restricted periods of male reproductive monopoly limit the scope for development of ties among fathers and offspring, paternal siblings, or extended paternal kin networks. In this article, I explore the impact of these factors on the evolution of ancestral human kinship systems. (shrink)

With the potential to process the world's agricultural and food waste, provide sustainable fodder for livestock, aquaculture, and pet animals, as well as act as a source of novel biomolecules, the black soldier fly, Hermetia illucens, has been launched into the leading position within the insects as feed industry. Fulfilment of these goals, however, requires mass‐rearing facilities to have a steady supply of neonate larvae, which in‐turn requires an efficient mating process to yield fertile eggs; yet, little is known about (...) adult reproductive behavior, nor what physiological factors lead to its emergence. Moreover, fertile egg production tends to be highly variable in colony. Therefore, this review brings together what is currently known of the organismal biology of H. illucens, compiling information on adult morphology, physiology, biogeography, genomics, and behavioral ecology. As a holistic synthesis, it highlights several directions of interest for research to follow. (shrink)

Simple Heuristics That Make Us Smart invites readers to embark on a new journey into a land of rationality that differs from the familiar territory of cognitive science and economics. Traditional views of rationality tend to see decision makers as possessing superhuman powers of reason, limitless knowledge, and all of eternity in which to ponder choices. To understand decisions in the real world, we need a different, more psychologically plausible notion of rationality, and this book provides it. It is about (...) fast and frugal heuristics--simple rules for making decisions when time is pressing and deep thought an unaffordable luxury. These heuristics can enable both living organisms and artificial systems to make smart choices, classifications, and predictions by employing bounded rationality. But when and how can such fast and frugal heuristics work? Can judgments based simply on one good reason be as accurate as those based on many reasons? Could less knowledge even lead to systematically better predictions than more knowledge? Simple Heuristics explores these questions, developing computational models of heuristics and testing them through experiments and analyses. It shows how fast and frugal heuristics can produce adaptive decisions in situations as varied as choosing a mate, dividing resources among offspring, predicting high school drop out rates, and playing the stock market. As an interdisciplinary work that is both useful and engaging, this book will appeal to a wide audience. It is ideal for researchers in cognitive psychology, evolutionary psychology, and cognitive science, as well as in economics and artificial intelligence. It will also inspire anyone interested in simply making good decisions. (shrink)

Religious beliefs, including those about an afterlife and omniscient spiritual beings, vary across cultures. We theorize that such variations may be predictably linked to ecological variations, just as differences in mating strategies covary with resource distribution. Perhaps beliefs in a soul or afterlife are more common when resources are unpredictable, and life is brutal and short.

SummaryPedigree structures of 161 uncle/niece-aunt/nephew and 4420 first cousin consanguineous marriages registered during the 19th and 20th centuries in two large and very different Spanish regions have been analysed and their genetic consequences evaluated. The frequencies of the different pedigree subtypes within each degree of relationship were quite similar in both populations despite significant heterogeneity in inbreeding patterns. The mean X-linked inbreeding coefficient for each type of cousin mating was calculated and compared to that expected for autosomal genes. The effect (...) of genealogical structure on theFx/Fradio was compared to different cultural populations worldwide. Preferentiality and avoidance of close consanguinity along with specific types of pedigrees are discussed on the basis of premarital migration and sociocultural rules still deeply rooted in certain human groups. By admitting that the observedFxcoefficient is usually higher thanFin most human populations some remarks have been made in terms of population genetic risk. (shrink)

In this article we attend to recent critiques of psychometric applications of life history theory to variance among humans and develop theory to advance the study of latent LH constructs. We then reanalyze data previously examined by Richardson et al., 2017, https://doi.org/10.1177/1474704916666840 to determine whether previously reported evidence of multidimensionality is robust to the modeling approach employed and the structure of LH indicators is invariant by sex. Findings provide further evidence that a single LH dimension is implausible and that researchers (...) should cease interpreting K-factor scores as empirical proxies for LH speed. In contrast to the original study, we detected a small inverse correlation between mating competition and Super-K that is consistent with a trade-off. Tests of measurement invariance across the sexes revealed evidence of metric invariance, consistent with the theory that K is a proximate cause of its indicators; however, evidence of partial scalar invariance suggests use of scores likely introduces bias when the sexes are compared. We discuss limitations and identify approaches that researchers may use to further evaluate the validity of the K-factor and other applications of LH to human variation. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Philosophy and Literature 26.1 (2002) 157-172 [Access article in PDF] Symposium: On Ken Burns's "Jazz" Jazz: America's Classical Music? 1 Lee B. Brown I VIEWERS OF KEN BURNS'S third cultural epic "Jazz" probably fell into one of three categories. 2 Some found it gripping. Some found it grating. Some found it both at once.The series has unforgettable moments: spectacular jitterbug sequences; Jimmy Lunceford's horn men fanning their trumpet bells (...) with hat mutes in sync; the close-up of the whirring cross-hand drumming of Art Blakey; the bitter-sweet glance Billie Holiday and Lester Young exchange in their last filmed appearance together; the occasional marriage of visuals to music. One riveting three minutes comes when the talking heads tune out, a 78-rpm disk of Louis Armstrong's "West End Blues" is set spinning, and the thrilling notes pour out on a carousel of visual imagery—finally freeze-framing on the face of the young genius himself.On the downside, the series is massively repetitious. As a result of Burns's decision to track two major figures—Louis Armstrong and Duke Ellington—from cradle to grave, the same cuts of Armstrong appear again and again, no matter what the time frame. Some of the series' commentators are particularly annoying—the fiddler of Burns's Civil War series, Matt Glaser, for instance, with his fatuous theories [End Page 157] about Louis Armstrong and Albert Einstein. And the documentary's heavy load of social freight—by Wynton Marsalis, and his mentors Albert Murray and Stanley Crouch 3 —threatens to flatten the music.The series is designed as informative entertainment, not Jazz 101. But Burns pays a price here, as he did in his documentary about baseball, in which not even the basics of the game, let alone any of the subtleties, were explained. In "Jazz" we get no explanation of what Jelly Roll Morton did to transform ragtime into jazz. (The series could easily have pressed Morton himself into service. With no sacrifice of his considerable charm, Morton did explain it, beautifully, in his recorded Library of Congress interviews. 4) Although the swing era gets big billing, no attempt is made to explain how swing rhythm actually works, as contrasted with earlier practices. (I have watched swing drummer Panama Francis entertain a packed hall with a brief but riveting illustration of how it works.)As jazz history, the film also has problems. Some legendary figures are resurrected unconvincingly. When Marsalis tells us what the legendary trumpet player Buddy Bolden sounded like, the illustrative off-camera trumpet is Marsalis's, not Bolden's, who embedded not one note in a record groove. Further, we face the tiresomely obvious problem of omissions. We hear nothing of Albert Ayler, Keith Jarrett, Sun Ra, Mildred Bailey, Benny Carter, Lennie Tristano, Erroll Garner, Eric Dolphy, Art Pepper, or Woody Herman. All we learn about Bill Evans—whose influence on jazz piano was huge—is that Miles Davis hired him even though he was white. Omissions are inevitable, of course. But there is a muted pattern to the exclusions. It was impossible for the series to avoid Benny Goodman, given his central role in the swing era. But white figures are too often either ignored or treated as alienated outsiders. We hear New York Times columnist Margo Jefferson opine that Bix Beiderbecke drank himself to death because he wasn't allowed to play with black musicians. In fact, many of the greatest players—white and black—never played with musicians of their own caliber.Most figures covered in the film are treated either with respect or with reverence. But things get nasty when matters turn to avant-gardists. Thus, Branford Marsalis—Wynton's talented brother—singles out the volcanic pianist Cecil Taylor for a particularly hostile attack. 5 Instead of explaining what Ornette Coleman meant by "free jazz," Albert Murray tells us that jazz is, by definition, free music—and by implication, that Coleman's concept must be fatuous. And Wynton has complained [End Page 158] elsewhere about a jazz avant-garde retreat into what he calls "a... (shrink)

Mammalian vomeronasal receptors respond to pheromones conveying information on gender, reproductive status and individual recognition. The question arises as to how this information is coded, which parts of the code require combinatorial activity and whether or not there are specific receptor neurons committed to sex discrimination. Are there receptor neurons that are committed to responding for female or male pheromones? Is there a sex difference for the proportion of these receptors, bearing in mind that it is very much in the (...) male's interest to distinguish the restricted oestrous phase of the female's cycle in order to successfully mate? Perhaps more intriguing is the complexity of individual recognition and whether or not the vomeronasal receptors actually possess this capacity. A recent paper in Science1 by Ron Yu and colleagues addresses these issues by literally visualising patterns of activity in VNO slices and determining what information is common across different individuals and what distinguishes them. BioEssays 30:802–805, 2008. © 2008 Wiley Periodicals, Inc. (shrink)

Patterns of three variables of reproductive strategies in male New World primates are examined: (i) how males obtain access to potential mates; (ii) how males obtain actual mating opportunities; and (iii) how males affect infant survival and female reproductive success. Male opportunities to associate with females, whether by remaining in their natal groups, dispersing and forming new groups, or dispersing and taking over or joining established groups, are strongly influenced by local population densities and correlate with female reproductive rates (...) and the extent of female reproductive seasonality and synchrony. Differences in male mating success are affected by female accessibility, whether male-male and male-female relationships are hierarchical or egalitarian, and whether female reproduction is seasonally restricted. Patterns of male behavior toward infants, characterized as active assistance, overt interference, or benign tolerance, appear to co-vary with differences in the degree to which males can affect female reproductive rates.These qualitative analyses suggest that the reproductive strategies of male New World primates can be classified along a continuum ranging from conservative to daring depending on whether female reproductive rates are relatively slow or fast and whether reproduction is strongly or weakly linked to seasonal ecological variables. Males adopt the conservative strategy of staying in their natal groups, forfeiting exclusive mating opportunities, and treating infants with tolerance when female reproduction is constrained by ecological factors. Conversely, males adopt the more daring strategy of dispersing and competing when potential payoffs through their ability to affect female reproduction are high. (shrink)

Zinacantec Family Homesign is a new sign language emerging spontaneously over the past three decades in a single family in a remote Mayan Indian village. Three deaf siblings, their Tzotzil-speaking age-mates, and now their children, who have had contact with no other deaf people, represent the first generation of Z signers. I postulate an augmented grammaticalization path, beginning with the adoption of a Tzotzil cospeech holophrastic gesture—meaning “come!”—into Z, and then its apparent stylization as an attention-getting sign, followed by (...) grammatical regimentation and pragmatic generalization as an utterance initial change of speaker or turn marker. (shrink)

The extreme sexual size dimorphism in spiders has motivated studies for many years. In many species the male can be very small relative to the female. There are several hypotheses trying to explain this fact, most of them emphasizing the role of energy in determining spider size. The aim of this paper is to review the role of energy in sexual size dimorphism of spiders, even for those spiders that do not necessarily live in high foliage, using physical and allometric (...) principles. Here we propose that the cost of transport or equivalently energy expenditure and the speed are traits under selection pressure in male spiders, favoring those of smaller size to reduce travel costs. The morphology of the spiders responds to these selective forces depending upon the lifestyle of the spiders. Climbing and bridging spiders must overcome the force of gravity. If bridging allows faster dispersal, small males would have a selective advantage by enjoying more mating opportunities. In wandering spiders with low population density and as a consequence few male–male interactions, high speed and low energy expenditure or cost of transport should be favored by natural selection. Pendulum mechanics show the advantages of long legs in spiders and their relationship with high speed, even in climbing and bridging spiders. Thus small size, compensated by long legs should be the expected morphology for a fast and mobile male spider. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Philosophy and Literature 26.1 (2002) 157-172 [Access article in PDF] Symposium: On Ken Burns's "Jazz" Jazz: America's Classical Music? 1 Lee B. Brown I VIEWERS OF KEN BURNS'S third cultural epic "Jazz" probably fell into one of three categories. 2 Some found it gripping. Some found it grating. Some found it both at once.The series has unforgettable moments: spectacular jitterbug sequences; Jimmy Lunceford's horn men fanning their trumpet bells (...) with hat mutes in sync; the close-up of the whirring cross-hand drumming of Art Blakey; the bitter-sweet glance Billie Holiday and Lester Young exchange in their last filmed appearance together; the occasional marriage of visuals to music. One riveting three minutes comes when the talking heads tune out, a 78-rpm disk of Louis Armstrong's "West End Blues" is set spinning, and the thrilling notes pour out on a carousel of visual imagery—finally freeze-framing on the face of the young genius himself.On the downside, the series is massively repetitious. As a result of Burns's decision to track two major figures—Louis Armstrong and Duke Ellington—from cradle to grave, the same cuts of Armstrong appear again and again, no matter what the time frame. Some of the series' commentators are particularly annoying—the fiddler of Burns's Civil War series, Matt Glaser, for instance, with his fatuous theories [End Page 157] about Louis Armstrong and Albert Einstein. And the documentary's heavy load of social freight—by Wynton Marsalis, and his mentors Albert Murray and Stanley Crouch 3 —threatens to flatten the music.The series is designed as informative entertainment, not Jazz 101. But Burns pays a price here, as he did in his documentary about baseball, in which not even the basics of the game, let alone any of the subtleties, were explained. In "Jazz" we get no explanation of what Jelly Roll Morton did to transform ragtime into jazz. (The series could easily have pressed Morton himself into service. With no sacrifice of his considerable charm, Morton did explain it, beautifully, in his recorded Library of Congress interviews. 4) Although the swing era gets big billing, no attempt is made to explain how swing rhythm actually works, as contrasted with earlier practices. (I have watched swing drummer Panama Francis entertain a packed hall with a brief but riveting illustration of how it works.)As jazz history, the film also has problems. Some legendary figures are resurrected unconvincingly. When Marsalis tells us what the legendary trumpet player Buddy Bolden sounded like, the illustrative off-camera trumpet is Marsalis's, not Bolden's, who embedded not one note in a record groove. Further, we face the tiresomely obvious problem of omissions. We hear nothing of Albert Ayler, Keith Jarrett, Sun Ra, Mildred Bailey, Benny Carter, Lennie Tristano, Erroll Garner, Eric Dolphy, Art Pepper, or Woody Herman. All we learn about Bill Evans—whose influence on jazz piano was huge—is that Miles Davis hired him even though he was white. Omissions are inevitable, of course. But there is a muted pattern to the exclusions. It was impossible for the series to avoid Benny Goodman, given his central role in the swing era. But white figures are too often either ignored or treated as alienated outsiders. We hear New York Times columnist Margo Jefferson opine that Bix Beiderbecke drank himself to death because he wasn't allowed to play with black musicians. In fact, many of the greatest players—white and black—never played with musicians of their own caliber.Most figures covered in the film are treated either with respect or with reverence. But things get nasty when matters turn to avant-gardists. Thus, Branford Marsalis—Wynton's talented brother—singles out the volcanic pianist Cecil Taylor for a particularly hostile attack. 5 Instead of explaining what Ornette Coleman meant by "free jazz," Albert Murray tells us that jazz is, by definition, free music—and by implication, that Coleman's concept must be fatuous. And Wynton has complained [End Page 158] elsewhere about a jazz avant-garde retreat into what he calls "a... (shrink)

The evolutionary origin of human pair-bonds is uncertain. One hypothesis, supported by data from forgers, suggests that pair-bonds function to provision mothers and dependent offspring during lactation. Similarly, public health data from large-scale industrial societies indicate that single mothers tend to wean their children earlier than do women living with a mate. Here we examine relations between pair-bond stability, alloparenting, and cross-cultural trends in breastfeeding using data from 58 “traditional” societies in the Standard Cross-Cultural Sample (SCCS). Analyses show that stable (...) conjugal relationships were associated with significantly later weaning among the societies in the SCCS. The relationship between pair-bond stability and age at weaning was not mediated by women’s ability to provision themselves or women’s kin support. Availability of alloparental care was also inversely related to age at weaning, and the association was not significantly reduced after controlling for frequency of divorce. This study indicates that among a woman’s kin relationships, a pair-bond with a child’s father is especially supportive of breastfeeding. These cross-cultural findings are further evidence that human pair-bonds may have evolved to support lactation. (shrink)

Cross-cultural studies have revealed broad quantitative associations between subsistence practice and demographic parameters for preindustrial populations. One explanation is that variationin the availability of suitable weaning foods influenced the frequency and duration of breastfeeding and thus the length of interbirth intervals and the probability of child survival (the “weaning food availability” hypothesis). We examine the available data on weaning age variation in preindustrial populations and report results of a cross-cultural test of the predictions that weaning occurred earlier in agricultural and (...) pastoral populations because dairy and cereal production increased the availability of easily digestible, nutrientrich foods appropriate for weaning. We found that, contrary to predictions, supplementation with liquid foods other than breast milk was delayed in agricultural populations relative to less agriculturally dependent ones and complementary feeding with solid foods was delayed in pastoral populations relative to those less dependent on herding. Although the duration of breastfeeding was longer in populations dependent on hunting, there was no qualitative evidence that such populations lacked foods appropriate for weaning. The patterns observed suggest that the relationships between demography and subsistence observed among preindustrial societies cannot be explained by the “weaning food availability” hypothesis. We discuss the implications for understanding the mechanisms underlying prehistoric human demography, subsistence shifts, allocation to parenting and mating effort, and the evolutionary implications of tradeoffs between diet and disease. (shrink)

Why is female violence a taboo? We suggest that both men and women actively contribute to the creation of this stigma. Men may benefit because nonaggressive women may make better mothers and be more faithful and fertile. Females may benefit by downplaying their aggressive nature because they will be perceived as more valuable mates and because they will be more accepted within female social groups.

Stanovich & West (S&W) appear to overlook the adaptivity of variation. Behavioral variability, both between and within individuals, is an absolute necessity for phylogenetic and ontological adaptation. As with all heritable characteristics, inter-individual behavioral variation is the foundation for natural selection. Similarly, intra-individual variation allows a broad exploration of potential solutions. Variation increases the likelihood that more optimal behaviors are available for selection. Four examples of the adaptivity of variation are discussed: (a) Genetic variation as it pertains to behavior and (...) natural selection; (b) behavioral and cognitive aspects of mate selection which may facilitate genetic diversity; (c) variation as a strategy for optimizing learning through greater exploration; and (d) behavioral variation coupled with communication as a means to propagate individually discovered behavioral success. (shrink)

Most research on mate choice in modern societies is based on data that may or may not reflect actual mating behavior (e.g., stated preferences, personal advertisements). In the present study, real-life matings were reported by a large representative sample of men and women (N = 1,133). These data were used to test an evolutionary model in which mate choice is hypothesized to depend on resources potentially contributed to reproduction by each sex. Consistent with the model, it was found that (a) (...) men (but not women) of higher social status acquire more mating partners, suggesting that male status is an important criterion in female choice; (b) women’s (but not men’s) number of partners decreases linearly with age, suggesting that female reproductive potential is an important criterion in male choice; and (c) women (but not men) display a significant relationship between marital dissolution and promiscuity, suggesting that female sexual exclusivity is an important criterion in male choice. These results are discussed in relation to understanding mate choice mechanisms from behavioral data. (shrink)

This title is part of UC Press's Voices Revived program, which commemorates University of California Press’s mission to seek out and cultivate the brightest minds and give them voice, reach, and impact. Drawing on a backlist dating to 1893, Voices Revived makes high-quality, peer-reviewed scholarship accessible once again using print-on-demand technology. This title was originally published in 1973.

Advances in multiagent simulation techniques make it possible to study more realistic dynamics of complex systems and allow evolutionary theories to be tested. Here I use simulations to assess the relative importance of reproductive systems (haplodiploidy vs. diploidy), mate selection (assortative mating vs. random mating) and social economics (pay-off matrices of evolutionary games) in the evolutionary dynamics leading to the emergence of social cooperation in the provision of parental care. The simulations confirm that haplo-diploid organisms and organisms mating assortatively have (...) a higher probability for fixing alleles and require less favorable conditions for their fixation, than diploids or organisms mating randomly. The simulations showed that social behavior was most likely to emerge a) when the cost for parental investment was much lower than the benefits to the offspring, b) when cooperation improved synergistically the fitness of offspring compared to the corresponding egoistic behavior and c) when alleles coding for altruistic or social behavior could be rapidly fixed in the population, thanks to mechanisms such as haplo-diploidy and/or assortative mating. Cooperative social behavior always appeared if sociality conferred much higher fitness gains compared to non cooperative alternatives suggesting that the most important factors for the emergence and maintenance of social behavior are those based on energetic or efficiency considerations. The simulations, in congruence with the scant experimental evidence available, suggest that economic considerations rather than genetic ones are critical in explaining the emergence and maintenance of sociality. (shrink)

This response reinforces several major themes in our target article: (a) the importance of sex-specific, within-sex variation in mating tactics; (b) the relevance of optimality thinking to understanding that variation; (c) the significance of special design for reconstructing evolutionary history; (d) the replicated findings that women's mating preferences vary across their menstrual cycle in ways revealing special design; and (e) the importance of applying market phenomena to understand the complex dynamics of mating. We also elaborate on three points: (1) Men (...) who have indicators of genetic fitness may provide more direct benefits when female demand for extra-pair and short-term sex is very low; (2) both men and women track ecological cues to make mating decisions; and (3) more research on female orgasm is needed. (shrink)

Bridging the gap between the world of science and the realm of the spiritual, B. Alan Wallace introduces a natural theory of human consciousness that has its roots in contemporary physics and Buddhism. Wallace's "special theory of ontological relativity" suggests that mental phenomena are _conditioned_ by the brain, but do not _emerge_ from it. Rather, the entire natural world of mind and matter, subjects and objects, arises from a unitary dimension of reality that is more fundamental than these dualities, as (...) proposed by Wolfgang Pauli and Carl Jung. To test his hypothesis, Wallace employs the Buddhist meditative practice of _samatha_, refining one's attention and metacognition, to create a kind of telescope to examine the space of the mind. Drawing on the work of the physicist John Wheeler, he then proposes a more general theory in which the participatory nature of reality is envisioned as a self-excited circuit. In comparing these ideas to the Buddhist theory known as the Middle Way philosophy, Wallace explores further aspects of his "general theory of ontological relativity," which can be investigated by means of _vipasyana_, or insight, meditation. Wallace then focuses on the theme of symmetry in reference to quantum cosmology and the "problem of frozen time," relating these issues to the theory and practices of the Great Perfection school of Tibetan Buddhism. He concludes with a discussion of the general theme of complementarity as it relates to science and religion. The theories of relativity and quantum mechanics were major achievements in the physical sciences, and the theory of evolution has had an equally deep impact on the life sciences. However, rigorous scientific methods do not yet exist to observe mental phenomena, and naturalism has its limits for shedding light on the workings of the mind. A pioneer of modern consciousness research, Wallace offers a practical and revolutionary method for exploring the mind that combines the keenest insights of contemporary physicists and philosophers with the time-honored meditative traditions of Buddhism. (shrink)

The present text book is intended as an introduction to elementary logic. Its content, structure, and manner have been determined in large measure - perhaps 'caused' is the better word- by certain desiderata about which the reader should be informed at the outset. The leading idea is that even an introductory treatment of logic may profitably be fashioned around a rigorous framework.

We focus on the question of how expertise as conceived by the Stoics interacts with the content of impressions. In Section 1, we situate the evidence concerning expert perception within the Stoic account of cognitive development. In Section 2, we argue that the content of rational impressions, and notably of expert impressions, is not exhausted by the relevant propositions. In Section 3, we argue that expert impressions are a subtype of kataleptic impressions which achieve their level of clarity and distinctness (...) due to the contribution of expertise. In Section 4, we argue that the expertise in living well not only allows the wise person to assent correctly but also affects the content of her impressions. We suggest that these two models – one’s attitude toward an impression being informed by expertise, and one’s impressions being affected by expertise – might characterize distinct stages of cognitive development. Stoic wisdom is not only a matter of the way one assents to one’s impressions but also a matter of the condition of one’s soul and, consequently, of the kinds of impressions one even entertains. Expertise offers a model of how cognitive and discriminatory improvement through practice and effort can transform the non-wise into the wise. A reading on which the content of impressions is not exclusively propositional illuminates a further aspect of this transformation. If the same propositions are accessible through impressions with different non-propositional content, we can account for cases in which the novice and the expert entertain the same proposition. (shrink)

The thirty year long friendship between Imre Lakatos and the classic scholar and historian of mathematics Árpád Szabó had a considerable influence on the ideas, scholarly career and personal life of both scholars. After recalling some relevant facts from their lives, this paper will investigate Szabó's works about the history of pre-Euclidean mathematics and its philosophy. We can find many similarities with Lakatos' philosophy of mathematics and science, both in the self-interpretation of early axiomatic Greek mathematics as Szabó reconstructs it, (...) and in the general overview Szabó provides us about the turn from the intuitive methods of Greek mathematicians to the strict axiomatic method of Euclid's Elements. As a conclusion, I will argue that the correct explanation of these similarities is that in their main works they developed ideas they had in common from the period of intimate intellectual contact in Hungarian academic life in the mid-twentieth century. In closing, I will recall some relevant features of this background that deserve further research. (shrink)

Bridging the gap between the world of science and the realm of the spiritual, B. Alan Wallace introduces a natural theory of human consciousness that has its roots in contemporary physics and Buddhism. Wallace's "special theory of ontological relativity" suggests that mental phenomena are _conditioned_ by the brain, but do not _emerge_ from it. Rather, the entire natural world of mind and matter, subjects and objects, arises from a unitary dimension of reality that is more fundamental than these dualities, as (...) proposed by Wolfgang Pauli and Carl Jung. To test his hypothesis, Wallace employs the Buddhist meditative practice of _samatha_, refining one's attention and metacognition, to create a kind of telescope to examine the space of the mind. Drawing on the work of the physicist John Wheeler, he then proposes a more general theory in which the participatory nature of reality is envisioned as a self-excited circuit. In comparing these ideas to the Buddhist theory known as the Middle Way philosophy, Wallace explores further aspects of his "general theory of ontological relativity," which can be investigated by means of _vipasyana_, or insight, meditation. Wallace then focuses on the theme of symmetry in reference to quantum cosmology and the "problem of frozen time," relating these issues to the theory and practices of the Great Perfection school of Tibetan Buddhism. He concludes with a discussion of the general theme of complementarity as it relates to science and religion. The theories of relativity and quantum mechanics were major achievements in the physical sciences, and the theory of evolution has had an equally deep impact on the life sciences. However, rigorous scientific methods do not yet exist to observe mental phenomena, and naturalism has its limits for shedding light on the workings of the mind. A pioneer of modern consciousness research, Wallace offers a practical and revolutionary method for exploring the mind that combines the keenest insights of contemporary physicists and philosophers with the time-honored meditative traditions of Buddhism. (shrink)

It has been argued that Pyrrhonists will have trouble acquiescing in the religious practices of their compatriots, since those practices depend on beliefs that are supposedly eliminated by suspension of judgement. According to this objection ..., the Sceptic’s religious behaviour will be inescapably disingenuous. As a way out of this predicament, some interpreters have suggested that the sort of religion that Sextus was familiar with did not require the kind of belief that is subjected to Sceptical examination. This, however, acquits (...) Sextus of the charge of insincerity at the price of taking religious behaviour to be a culturally contingent exception to, rather than a standard case of, Pyrrhonian conduct. Another worry concerns the fixity of Sextus’ philosophical agenda. The argument in PH 3 concludes that, if one goes by what dogmatic philosophers have to say, one will be forced to think that god is inconceivable. By contrast, the first part of the M 9 section on theology argues not for suspension of judgement across the board, but only for the more modest claim that several noteworthy explanations of the emergence of religious belief are unsatisfactory. Insofar as this is the case, M 9 fails to live up to the standard set by PH 3, a failure due either to authorial incompetence or to a difference in philosophical objective. If that is the case, then the two discussions cannot be read as successful examples of the same philosophical outlook. In this paper, I argue for a comprehensive reading of Sextus’ take on religious matters that responds to these worries. In the first half of the paper, I present the two caveats as formulating a uniform agenda concerning theology (Section 1) which is further consistent with the Pyrrhonian stance as presented in PH 1 (Section 2). I show not only that Sextan Sceptics are able to engage in ordinary religious practices, but also that they can do so whether or not their cultural environment takes these practices to depend on holding dogmatic beliefs. In the second half of the paper, I argue by way of a detailed analysis that both PH 3 and M 9 are intended to motivate suspension of judgement about highly specific dogmatic tenets, and while their sources and targets might change, their intended outcome remains the same. The argument in PH 3, often understood as a sort of ‘master argument’ aimed at disarming a broad theistic consensus, depends in fact on peculiar commitments concerning the nature of inquiry (Section 3). The conceptual section of M 9 incorporates explicitly dogmatic—and quite plausibly Epicurean—material in order to argue for suspension of judgement about yet another issue, namely, the question of the natural or conventional origin of the concept of god (Section 4). (shrink)

In Hellenistic philosophy, one can find contrasting evaluations of the argumentative use of merely conceivable states of affairs. On the one hand, Epicureans discard any proposal that has no plausibility from the point of view of someone in possession of the relevant expertise. On the other hand, Sceptics regularly invoke views which one might conceivably hold, irrespective of the view’s epistemic credentials or whether or not it has or has ever had actual proponents. Since thought experiments often introduce scenarios involving (...) merely conceivable but non-actual states of affairs, the positions of Epicureans and Sceptics regarding conceivability can be transposed into different attitudes towards the method of thought experiments. (shrink)