"Reason is a function of thinking."
Oh. But only for the reasonable people, right? I like that word, reason, much better now. I have a copy of the 1828 original Websters ... and looked up 'reason'. Turns out its origin is from the latin 'ratio', which merely means 'to number'.
So much of reasoning, all?, thus, is based on the ability to be numerate. But woe betide the illnumerate.
Ah sweet reason, lovely logic ... the power of thinking.
Maybe we can make headway via another route ... tomorrow.
Are you a golfer?
And the illiterate too. I think the word you are looking for is "innumerate".