Hi all...long time since I've stopped in here. I would contend the following:
Reason "proper", originates out here in the physical world...not in our heads.
We learn reason from the physical world - or "reality" - were we intellectually sense/learn the real world to the best of our ability growing up, that then creates our percieved world view in our heads, that is held together in our head .....by our "perceived" logic and reason for the things we've experienced.
Note first that we live in 2 worlds: the one out here, and the one in our heads - that we "think" we is the one our here (not precisely).
Note that everything out here is calculated, and so determined/manifested, one moment to the next, from cause to effect, by a single "universal reason" (i know crazy...but I can demonstrate)...there's absolute physical rules. In our heads...no rules.
This calculation out here, in between cause and effect, is mathematically absolute.
Reality is considered "real", because it can only be real, in the sense that it cannot be mathematically false.
All cause and effect, one moment to the next, is by the same fundamental reason, and is what makes reality "logical"...because everything is connected by the same reason to everything else.
Physical reality, in "reality" is a "suspended" physical state, where everything is being determined at every moment. Even the things you see right now - still - on the table in front of you, are being determined moment to moment. Right now they're still because they're sitting in equilibrium.
The different atoms with electrons spinning around each atom, combine to make the basic elements, that combine again to make the things in front of you. They were not determined long ago, but are being determined this very moment...from the bottom up.
So, reason and logic "proper", does not originate in our heads.
The answer you're looking for is not in our heads...it's out here...demonstrable and self evident.