Could You Have Thought Differently? An Argument Against Free Will

This paper develops a new argument against free will, understood as the principle of alternative possibilities (PAP). This principle has been central in debates around free will and moral responsibility; however, it is almost always stated in terms of bodily rather than mental action, and it is therefore mainly understood as the possibility to physically act differently, rather than to think differently. The argument presented here is aimed at the latter, which is termed the possibility of alternative thought (PAT). It argues on psychological grounds that it is impossible for a subject to think differently than it does in a given situation. First, I make the possibility of alternative thought explicit, explain what it means for a self to entertain a thought (or conscious content), and I define a notion of conscious control that is required for the argument. I then offer a taxonomy of content types, based on how they are being controlled. In the third section, I analyse the scenarios of content generation for each type of content, to determine whether they can satisfy the PAT. It will be shown that this cannot be the case.