Role-functionalism and Realizer. functionalism There is yet another distinction between kinds of functional theory -one that crosscuts the distinctions described so far- that is important to note. This is the distinction between what has come to be known as“role” functionalism and“ realizer” functionalismRole-functionalism and Realizer￾functionalism  There is yet another distinction between kinds of functional theory — one that crosscuts the distinctions described so far — that is important to note. This is the distinction between what has come to be known as “role” functionalism and “realizer” functionalism