What is the role of mental variation in cognitive science? I will attempt to answer this question by dividing it into two separate questions: (1) what role does mental variation already (or implicitly) play in cognitive science? and (2) wouldcognitive science benefit by inquiring (explicitly) into the role of mental variation? I will attempt to show that mental variation already plays an important (though not always explicit) role in cognitive science. Additionally, I will suggest that expli...