 In the spirit of Mach, Roy A. Sorensen has offered an aspiring version of experimentalism that accounts for thought experiments in science and philosophy, and tackles many of the central issues of the topic. Sorensen claims thought experiments are “a subset of unexecuted experiments” (1992, p. 213). By their logical nature they are paradoxes that aim to test modal consequences of propositions. The origin of our capacity of thought experimentation is explained in terms of Darwinian evolution (as in Genz 1999, pp. 25–29), though the explanation has been criticized to be only little more than a ‘just so story’ that fails, on a posteriori grounds, to epistemically underwrite that capacity (see Maffie 1997). Others are more optimistic (see Shepard 2008).