A book by this thinker that proposes “eternal sentences” was referenced by the title of a “metaphysical study” by Roderick Chisholm. In a paper discussing ontological commitments, this philosopher dismissed the interlocutors McX and Wyman’s (10[2])positions on the existence of Pegasus. (10[1])This “reluctant Platonist” used a criterion he outlined in “On What There Is” to argue, along with Hilary Putnam, for the existence of mathematical objects by appealing (10[1])to their indispensability. Daniel Dennett used this thinker’s name as a verb in the title of a paper arguing against qualia. A paper by this author of Word and Object considers two versions of the phrase (10[1])“No bachelor is married” to argue against the analytic–synthetic (10[1])distinction. For 10 points, name this American philosopher of “Two Dogmas of Empiricism.” ■END■ (10[2]0[2])