Definition
Black-and-white thinking is the tendency to evaluate situations, people, or oneself in absolute either-or terms with no middle ground. A day is either a success or a waste. A person is either trustworthy or not. A piece of work is either perfect or a failure. It's one of the cognitive distortions most commonly identified in cognitive behavioral therapy.
What it can feel like
Decisions feel high stakes because every option carries a binary verdict. Mistakes register as total failures rather than small errors. Praise that contains a single piece of criticism is heard mostly as criticism. The middle of a project tends to feel discouraging because nothing is yet finished, which the mind interprets as not yet successful.
Why it happens
The brain takes cognitive shortcuts under stress, and absolutes are computationally cheaper than nuance. Categorical judgments also feel protective, because uncertainty is uncomfortable and a verdict, even a negative one, ends the uncertainty. The pattern often softens with cognitive behavioral therapy, where the work isn't to argue against the absolute but to notice it, name it, and then look for the missing middle ground.
When to see a clinician
When black-and-white thinking is producing significant relationship strain, mood swings tied to perceived rejection, or impulsive decisions in response to one bad event, it's worth raising with a therapist. CBT and dialectical behavior therapy both address it directly.