If two creatures can be functionally identical yet mentally different in their qualia, then functional identity does not entail mental identity

Since behaviorism is not a popular position these days, this application of an inverted qualia scenario is perhaps not so interesting. And given the complications discussed in subsection 2.3.1, there is even room for a behaviorist to resist. However, of considerably more interest are similar arguments against functionalism (and physicalism). Block and Fodor (1972), who invented the terminology of ‘inverted qualia’, were the first to formulate an inverted spectrum argument against functionalism,