J. Lambert

Darwin's “mystery of mysteries,” the origin of species, is caused by the evolution of speciation phenotypes, i.e. phenotypic differences that depress gene flow between daughter species during speciation. Postmating, prezygotic (PMPZ) differentiation characterizes many closely related species causing conspecific sperm precedence (CSP), wherein a female preferentially utilizes conspecific over heterospecific sperm in fertilization. Until recently, the components of CSP have been difficult to observe and study in internally fertilizing organisms. Research into the mechanisms of CSP is now progressing rapidly with the help of new innovative research tools. With the recent development of a sperm labeling system enabling distinct labels for different males, direct observations of competing male sperm within the female reproductive tract are possible, revealing multiple PMPZ phenotypes that combine to cause CSP. The discovery of mechanisms underlying CSP predicts an exciting future for studies of PMPZ speciation phenotypes and possible general principles underlying the origin of species.

This note is a comment on Suppes's essay on the limits of rationality. The substantial point is that if a theory of rationality is conceived as a structure plus scope, then, contra Suppes, intuitive judgement is part of the theory of rationality because it is part of the scope of that theory. The point is supported by analogy with a learning theory. Finally, intuitive judgement and informal knowledge is suggested to be evidence of the irreducible vagueness of theory as opposed to irreducible limits on theory

The major goal of this paper is to argue that a well known argument to overturn the principle that coextensive predicates substitute in any statement without alteration of truth value can be avoided - even in the simplest of languages. Apparently this can be done nonartificially only by expanding the universe with nonexisting objects. It is not proved that the principle of substitution salva veritate holds in Meinongian model structures, but in fact it does - as any completeness proof of free logics based on inner domain-outer domain semantics will show. I f - as some have suggested - Meinong's views are compatible with the attitudes of a complete extensionalist, and he subscribed to the outlined modern theory of predication, there is no escape from Außersein. That may seem terribly obvious, but in the light of the development of free logics, more than mere conviction is needed. This dogmatic intuition is supplanted with some strong inclining reasons

SummaryIn the above titled remarks, a distinction between general terms and predicates is made following Quine and Leonard. It is argued that, given Quine's characterization of extensionality vis a vislanguages in his book Word And Object, a language similar to the regimented language Quine regards as adequate for the purposes of science and philosophy, except for the addition of constant singular terms some of which may be irreferential, can be completely extensional. If correct, this conclusion, apparently at odds with a proof to the contrary by Lambert in 1974, is a heretofore unnoticed consequence of the distinction between predicates and general terms, and should be of concern to naturalistically inclined philosophers