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Full Idea
Although logic does not seem specially relevant to reasoning, immediate implication and immediate inconsistency do seem important for reasoning.
Gist of Idea
Logic has little relevance to reasoning, except when logical conclusions are immediate
Source
Gilbert Harman (Change in View: Principles of Reasoning [1986], 2)
Book Ref
Harman,Gilbert: 'Change in View: Principles of Reasoning' [MIP 1986], p.20
A Reaction
Ordinary thinkers can't possibly track complex logical implications, so we have obviously developed strategies for coping. I assume formal logic is contructed from the basic ingredients of the immediate and obvious implications, such as modus ponens.