like most psychological analysis (which this was) a lot of assumptions are made to fill the gaps and make sense of coincidences in nature.  yes, we make connections to real and intangible words and ideas all the time, but it doesn't prove that reason and logic ARE the same thing.  i'm just not buying it.

what if...

emotions for primitive man were reason v1.0.  beta logic for human beings, if you will.  as we started to become proficient with fact-based logic, gut feelings took the back seat as primitive logic became replaced with this newer form of logic.  that would explain why some unevolved forms of homo sapien (conservatives) are not as readily equipped with logic v2.0 appartus that others have (liberals) in the brain.

 could just be evolution, baby.  why not?