It has become very popular among philosophers to attempt to discredit, or at least set severe limits to, the thesis that there exist conceptual schemes radically different from ours. This fashion is misconceived. Philosophers have attempted to justify it in two main ways: by means of arguments which are a priorist relative to the relevant linguistic and textual evidence (and either independent of or based upon positive theories of meaning, understanding, and interpretation); and by means of arguments which are a posteriorist relative to that evidence. The former approach is misconceived, not only in that its particular arguments fail, but also in principle. The latter approach, while in general the right sort of approach to adopt to the question, arrives at its conclusion only through faulty execution, through misinterpretation of the evidence. Though quite unjustified, philosophers' hostility to the thesis of radically different conceptual schemes is easily explained, namely, in terms of a number of psychologically powerful motives which it subserves. These motives cannot step in to provide the missing justification, however. Instead, they reveal such hostility in an even shadier light.