Why we still need a mark of the cognitive

What makes a process a cognitive process? I’m not just asking for a list of cognitive processes, but for what makes an item on that list a cognitive process. Why should it be on the list? This is a question that has been ignored far too long in the domain of research calling itself cognitive science. It is time to give an answer and that is what I propose in this paper. I contrast my answer with others that have been given and defend the need against some claims in the literature that a mark of the cognitive is not needed.