System 1 loves to use limited information to form quick judgments and then block out conflicting information. The author Daniel Kahneman calls it W.Y.S.I.A.T.I. (What You See Is All There Is).
Kahneman explains that System 1 sees two or three pieces of information and then “infers and invents causes and intentions, then neglects ambiguity and suppresses doubt.”
Just try to ask, “Why might the opposite be true?”