It is either black or white. Black or white means: black or white, there are only two possibilities. This is an extreme absolutism. Black or white is a figurative description. In fact, there is a gray area between black and white. Thinkers ignore the existence of these intermediate colors, limit their choices to black and white, and make an either-or choice.

Black or white is also called falsedilemma. When reasoning on the premise of word selection and hypothetical statements, it focuses on the idea of black or white. Black and white is black and white; Metaphors are good and evil, right and wrong, good and evil, clear and turbid. See Mozi Tianzhizhong: "The kindness and unkindness of princes and nobles in the world must be measured, which is similar to the distinction between black and white." Metaphor is right and wrong, good and evil.