 We now turn to question (c), which concerns the distinction between use and reuse of a cognitive mechanism. At a first approximation, a cognitive mechanism is used when it performs its primary function, while it is reused when it is activated to perform a different, non-primary function. For example, one is using one’s visual mechanism when one employs it to see, while one is reusing it when one employs it to conjure up a visual image (see Anderson 2008, 2015 for further discussion of the notion of reuse). All this is a bit sketchy, but it will do.