[quote=whizzball1]
Of course. That sort of common sense-ish logic that when used is in retrospect very simple so why did nobody think of it?
[/quote]

In a way; that's a form of it. It's one of the ways IQ is measured, albeit somewhat inaccurate. Sherlock Holmes theoretically was proficient with this logic, and was evidently both born with it and acquired it over years of experience.