This brief volume supplements Lemmon's classic introductory logic text with almost 200 new exercises, many of them solved, solutions to selected exercises in _Beginning Logic_ itself, a helpful commentary on Lemmon’s use of key technical terms, alternative formulations, and advice to students.

1. The view that beliefs can be characterized solely by their motivational role promises an informative reduction of what it is for a state to be a belief state. It is therefore of import if such a view is wrong. In ‘On the aim of belief’ David Velleman (2000) presents an argument against such a motivational view of belief.1 On Velleman’s construal of the motivational view.

We show that neither the descending chain property nor the finite model property is a necessary condition for a model logic having no minimal proper extension. This answers in the negative two questions raised by G. E. Hughes.

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ABSTRACT Benjamin Page's thoughtful critique of my book, The Illusion of Public Opinion, strives to reassure readers that all is well—despite the book's extensive documentation of measurement‐error artifacts in numerous public opinion surveys. Page's own careful polling practices are not followed outside of elite academic survey centers. Moreover, even in such well‐run surveys, the respondents are often ignorant of the issues being probed. The fact that nonrandom reasons of some sort must be determining on‐the‐spot survey responses may allow us to (...) call the respondents “rational” in a loose sense. But the responses still don't represent actual opinions about the specific policy issues being probed—let alone well‐informed answers. Finally, while Page argues that measurement errors are most likely random, and should cancel out in the aggregate, the “miracle of aggregation” doesn't occur when the form, wording, and context of questions varies from survey to survey. And even when wording and context are held constant, the respondents' understanding of the same words can vary dramatically or subtly over time, due to new political events and their changing interpretation. (shrink)

Steroid hormone receptors are ligand‐inducible transcription factors that exhibit potent effects on gene expression in living cells. Precise dissection of their mode of action at the molecular level can best be carried out in functional cell‐free systems. This article will describe the benefits of such systems and review their development up to the recent establishment of steroid receptor‐dependent in vitro transcription. Subsequent advances in our knowledge of receptor function arising from the exploitation of this powerful experimental tool will be described. (...) Particular emphasis will be placed upon two key problems: the role of steroid hormone in receptor action and the mechanisms by which steroid receptors activate gene transcription. (shrink)