Rationale

Deduction of the world, earning of meaning.
Used by: People with too much free time, Academics, Analysts.
Rationale is the force that puts the clues together and make them *click*. Logic specially, bestows you to come to conclusions without being told the whole story, it allows for the prying of extra information with common sense.
A high level of Rationale allows you to effectively come to conclusions with as least information as possible, some would argue you knew the answer beforehand. However, a lacking Rationale is going to make a difficult time solving mysteries and finding clues, and even if you are given the clues, it might not be as obvious to you...
Main Frame
Proficiency - Eloquence