The fertilizing ability of spermatozoa is inhibited by certain substances present in the seminal fluid. Most of these antifertility factors are proteinaceous in nature and differ in their physical characteristics. They inhibit fertilization by inhibiting either motility, capacitation, acrosome reaction or penetration of the ovum investments by the spermatozoa. This review describes and discusses the properties of these factors and their possible role, individually and collectively, in the regulation of fertility.

P S Wilson; Perspectives on Punishment—Reply to Pamela Moore, Journal of Philosophy of Education, Volume 8, Issue 1, 30 May 2006, Pages 103–134, https://doi.org.

P S Wilson; Child-Centred Education, Journal of Philosophy of Education, Volume 3, Issue 1, 30 May 2006, Pages 105–126, https://doi.org/10.1111/j.1467-9752.1969.

P S Wilson; Interests and Educational Values, Journal of Philosophy of Education, Volume 8, Issue 2, 30 May 2006, Pages 181–199, https://doi.org/10.1111/j.1467-.

P S Wilson; Interests, Values and Educational Language, Journal of Philosophy of Education, Volume 10, Issue 1, 30 May 2006, Pages 147–166, https://doi.org/10.1.

Chapter Promising in Law and Morals Promissory and contractual obligations raise many issues of common interest to philosophers and lawyers. ...

P S Wilson; Perspectives on Punishment—Reply to Pamela Moore, Journal of Philosophy of Education, Volume 8, Issue 1, 30 May 2006, Pages 103–134, https://doi.org.

P S Wilson; Child-Centred Education, Journal of Philosophy of Education, Volume 3, Issue 1, 30 May 2006, Pages 105–126, https://doi.org/10.1111/j.1467-9752.1969.

P S Wilson; Interests, Values and Educational Language, Journal of Philosophy of Education, Volume 10, Issue 1, 30 May 2006, Pages 147–166, https://doi.org/10.1.

MY PAPER EXAMINES THE ’VIOLATION’ CONCEPT OF THE MIRACULOUS, INVOLVING THE OCCURRENCE OF AN EVENT RULED OUT BY A LAW OF NATURE. ANY BELIEF IN THE OCCURRENCE OF SUCH AN EVENT IS IRRATIONAL, IN THE SENSE IN WHICH IT WOULD BE IRRATIONAL FOR YOU TO BELIEVE AT THIS MOMENT THAT YOU WERE NOT READING THIS ABSTRACT BUT WERE HALLUCINATING. TO SHOW THAT IT IS NOT ALWAYS IRRATIONAL TO BELIEVE IN MIRACLES, ONE MUST ASSERT THAT TO KNOW WITH CERTAINTY THAT AN (...) EVENT IS PHYSICALLY IMPOSSIBLE, IS NOT TO KNOW WITH CERTAINTY THAT IT IS IMPOSSIBLE, ON GROUNDS THAT ITS OCCURRENCE DOES NOT INVOLVE A SELF-CONTRADICTION. BUT SUCH A PREMISE LEADS TO A FORM OF GENERAL SKEPTICISM WHICH WOULD MAKE IT IMPOSSIBLE EVER TO ESTABLISH THAT ANY EVENT HAD OCCURRED. (shrink)

Antiphon's speech on the murder of Herodes has been variously dated by several scholars, but all seem to agree that it was delivered a good many years after the revolt and recapture of Mytilene. According to this opinion the speaker in § 74 declares himself too young to know much of what happened in those days. Before going into this more carefully, it seems necessary to visualize the situation of the accused man. In order to achieve this the best we (...) can do is to follow his own words in the Sirjyrjcris, §§ 20–24: ‘I travelled from Mytilene on the same ship as the lost man; we were on our journey to Ainos, I to see my father—he happened to be there at that time—he in order to sell some slaves to Thracian natives. These natives, who were to pay the ransom, and the slaves were on board too.—All this I will prove by witnesses.—As we, however, met with stormy weather, we were compelled to put in to a harbour in the territory of Methymna; there we found that* ship into which Herodes changed; in that ship, according to the accusers, he died. Now all this was mere chance: obviously I had not persuaded him to travel with me, no, he was travelling on his own business. Then I, personally, had a very good reason for travelling to Ainos; our putting in to that harbour was not premeditatd, we were compelled to. And again, when we were lying at anchor, the change of ship took place without any trickery or fraud: again, it was done because of necessity. The ship, viz., on which we had been travelling was not covered, the other one on the contrary had a covering; that was because of the rain.—All this I will prove by witnesses.—After boarding the other ship we drank some wine. After that it is only known that he left the ship, but did not return. I myself never left the ship that night at all. When the next day but did not return. I myself never left the ship that night at all. When the next day he had disappeared, we looked for him, I as well as the others. Probably it seemed strange to them, it certainly did to me. And it was I who caused a messenger to be sent to Mytilene, not one of the crew or the passengers belonging to Herodes, but my own servant. If I had been guilty, I would not, of course, have sent a man who might have informed against me. But when the man could not be found in Mytilene, nor anywhere else, and when the weather had improved and all the other ships were putting out, I also sailed.—All this I will prove by witnesses. (shrink)

The author sides with the linguistic philosophers in that to analyse 'moral reasoning' is to provide a conceptual description of a prescriptive or normative area of language. He considers the question of why we should adopt a "moral point of view" in terms of toulmin (who thinks it is a meaningless question) and baier and nelson (who think it is legitimate). The author argues that it is a crucial question which must be answered. He concludes that baier has not proven (...) that the normative criteria of justification involved in morality constitute a question for the philosopher. (wstaff). (shrink)

This paper critically examines traditional rule-based and externalist approaches to the teaching of business ethics. The review materializes in a framework of seven pitfalls associated with the traditional approach, and bridges to overcome these perils are offered. Care is taken to avoid submitting the implausible positions of moral relativism. A perspective of methodological pluralism and normative internalism is developed and presented as a fruitful avenue for effective teaching in business ethics, and possible avenues for empirical exploration are offered.