Most decisions that are made are rarely made using…
Most decisions that are made are rarely made using reason or logic exclusively. A person generally does not have all the information they need or the time that they need to perfectly predict any decision. Therefore, since the conscious can only use logic and reason, many decisions have to be made by the unconscious. The unconscious can be called your gut or intuition. A finally tuned or sensitive unconscious mind combined with confidence and experience results in great intuition.
— from Decisions & Choices (Decision/Choice/Focus/Forethought/Consequences)
In the book
Guard against the mind's built-in distortions, because they hijack decisions silently: loss aversion, which makes you fear a loss more than you value the equal gain; the framing of the same facts in different lights; and the anchors the first number drops in your head — and beware, above all, overconfidence, with its dismissal of bad news and its illusion of control. Know, too, that no decision is ever made by reason alone; when the facts and the time run out, it is your gut that decides, which is exactly why you must train that intuition with experience until it is worth trusting. And on the big ones, borrow other minds. — Decisions & Choices (Decision/Choice/Focus/Forethought/Consequences)