What I am trying to say is that for some particularly hard determinists, neither you nor I have it within our capacity to demonstrate that what we are trying to say includes the option of choosing to say something else instead.
I’m writing this and you’re reading this only because whatever set into motion the laws of matter has over billions of years evolved into brain matter that is now able to create the psychological illusion in each of us of having an actual option to write or read something else instead.
I can only acknowledge that my understanding of “I” here is wrong. And that one day I will experience something new or meet someone new and come into contact with a new idea that changes my mind.
But that still entails an obligation on my part to demonstrate to others that they are obligated in turn to think like I do because I have in fact demonstrated that some measure of free will is in sync with the brain properly understood.
An understanding that encompasses human biology, human psychology, human philosophy and human science.
Free will encompassed in a TOE that overlaps our lives for all practical purposes.
In other words, I am far more interested in approaching this from the other direction. Define your words and then take the definitions themselves out into the world that we actually live in.