Confusing ontological materialism and methodological materialism complicates discussions here But you would have to assume that free will doesn't exist — filipeffv
Not necessarily. Free will could be a manifestation of the infinite possible outcomes of the reactions within the brain and that our "consciousness" is the brains method of controlling/reducing the number of outcomes. Or, it could be what we experience as our brains navigate the higher dimensions of time and attempt to interpret that information. Free will would be our ability to choose which possible path we take through higher dimensions.
everything is a successive and progressive process of causes, it necessarily assumes a free first cause — filipeffv
I agree that there should be a first cause, just not necessarily a "free" one. In order to determine the nature of "the first cause" we must understand what came before. As the Big Bang Model suggests, nothing came before the first cause, which is perfectly plausible since nothingness is both unstable and infinite. Therefore, if the first cause is within what is possible, then it must be a part of nature.
the chemical process of mind are not causes, but effects — filipeffv
As you said above, they as a successive process of cause and effects. Each cause creates an effect, and each effect is a cause that creates another effect. The distinction is redundant.
As for the next section, i have to admit i don't really understand what you mean and will concede your point with a smile and slightly glazed look in my eye.
The point of my whole thread (Physical vs. Non-Physical) was to question this distinction between what science can explain and what some other method can explain. — Harry Hindu
There are many explanations to what is and what is not and science is the best method we have so far come up with to find them regardless of whether the subject is physical, not physical, natural or super natural. This is because science is merely a method of analysis and can be applied to anything.