I think you are substituting reasoning with deduction. Reasoning is the human process of deciding what one ought do. Deduction is a mechanical process of disco

I think you are substituting reasoning with deduction. Reasoning is the human process of deciding what one ought do. Deduction is a mechanical process of discovering what follows from axioms. Human reasoning is often fails by not being perfectly deductive. I'll grant that you might think I'm nitpicking on definitions.