Neuroscientists also believe that all mental behavior can be correlated with physical processes, but you will not see this belief justified every time it is bro

Neuroscientists also believe that all mental behavior can be correlated with physical processes, but you will not see this belief justified every time it is brought up. In research level geometry you will not see the definition of manifold in the preamble of every paper, nor will you see a reference for each standard theorem used. All domain experts have knowledge which they do not attempt to justify to other domain experts, and someone on the outside looking in cannot readily discern what is widely-held and justified knowledge and what is widely-held but unjustified knowledge. It gets even worse actually. Every scientific discipline has "folklore": Results commonly known by experts but not organized for pedagogical purposes anywhere. Unpublished theses, coffee table discussions, lecture notes that are distributed in private, etc. So even if one knows where to look in the literature to find evidence for a claim, it might not even be there. One may have to talk to an expert directly.