This is more about "Prima facie", as a legal and rational term. On face value, we weigh evidence, intending to look anew. We must consciously discard existing assumptions, in order to consciously re-asses the topic of free will.

We accept that: -in utero nutrients and stress for the mother can affect behaviour later. -A horridly abusive childhood influences behaviour later. -A hot day can alter a person's cognitive ability. -Low blood sugar can affect emotional intensity and cognitive ability.

...There are so many circumstantial factors which influence our thinking, involuntarily, that they must be considered overwhelming.

Competing with all of that evidence for why people behave the way they do (sociology, psychology, neurology, etc) is the experience of "being" oneself. An agent of one's own story.

The narrative we create for ourselves, about why we do what we do, presently seems to come after the biological and circumstantial reaction to influences on us. From this position (so far an empirical one) we can surmise that our own personal narrative is more of a post-reaction rationalisation, and not actually something which could be called "free" or "agency" or "independence".

However, because we cannot be certain that free will is not some metaphysical, sans-causation "force" (sorry for lack of a better term) we cannot presently explain, we must accept that free will is not disprovable. Much like God.

We have a weight of empirical evidence which explains influences upon people, and it is opposed by "feelings", culture, religion, and subjective experience. Anecdotal stories promote free will. These are the same as thinking a dream is real at the time, or thinking the room is warm when really you have a fever. This is subjective experience, not empiricism.

We can doubt (Descartes) pretty much anything from an epistemological point of view, but after that, we still have to accept that there is a weight of evidence one way or another. This is our (limited) guide for our rational positions.

The weight of evidence leads us to see that advertising exists because it works. An influence designed to corrupt rational choice, still exists because it is effective.

We are all unaware of two major influences on our actions. One is bias. Irrational bias exists as an influence on us, largely because we are unaware of it. We cannot compensate for a bias of which we are unaware. The other big influence is the cultural indoctrination of ideas we have ceased to question. We do not question foundational cognitive items, if it does not occur to us to do so. We don't know what our assumptions are, until something happens to revel them.

The more likely, evidence based scenario, is that we are far more reactionary, involuntary actors, than not. On top of that, we are more likely to rationalise our own agency post-neurology, post-influence, than to be "free" agents. Then we arrive back at the idea that our own subjective experience of agency and "self" is involuntary.

I hope that helps further the discourse.

I'm sorry I am unfamiliar with Thomas Kuhn's work, I will examine it soon. In the sense that a statement's opposite ought to be true, if the statement is true... I'm not sure how to apply that to personal subjectivity of self and the involuntary narrative we observe ourselves observing. hehe.