Some people consider themselves logical because they’re systematic, but they tend to begin from faulty premises and indulge in fallacies.

Most of our grievances with “logical” people tend to be caused by errors in perception more so than errors in logic.

One’s reasoning may be sound (though it often isn’t), but if he begin with faulty premises, his subsequent evaluations will be way off the mark.

And a lot of “logical” people overlook this (which isn’t a very logical thing to do, practically speaking!), being very frustrating to deal with. A truly rational person, in my opinion, constantly reminds himself of the fallibility of his own perceptions.

Example:

He criticized my perspective, and in doing so, insulted me. (Assumption/Misunderstanding.)

He must have a problem, either with me, or within himself.
(Valid if the assumption was valid, but otherwise not.)

It would be a good idea to draw attention to his problem by insulting him in return (Not being clear about what the optimal outcome is).

It’s only fair, and therefore right.
(Subjective, context-dependent.)

Practical logic cannot be separated from value-judgements, and value-judgements are rooted in emotion, often unexamined and misinterpreted.

If you consider yourself a logical person, take some time to think about how often you misinterpret evidence and make unwarranted assumptions.