Abstract
This chapter considers Arthur Danto's use of a particular thought experiment to support his theory of art and Richard Wollheim's discussion of it. It also considers a comparable thought experiment about conceptual issues in ethics. The chapter presents how some thought experiments in moral philosophy do and do not resemble Danto's gallery of indiscernibles. A. Surprisingly, in his own discussion of the permissibility of certain acts of killing and harming, Danto seems to have adopted a view similar to the one Wollheim adopted about Danto's indiscernibles. Use of thought experiments in ethics is often unlike the use of thought experiments in Danto's work. The chapter explores how ethics employs thought experiments to determine permissibility of acts and whether thought experiments could comparably be used to determine the merit of artworks.