Self-esteem is one thing. But many psychologists have been preaching the gospel of self-delusion. They argue it's actually healthy to think more highly of yourself than reality warrants. There's ...

Rational beliefs are formed on the basis of solid evidence and are open for appropriate revision when emerging evidence makes them less likely to be true. In contrast, a person with a delusion will ...

From calling yourself "delulu" to saying you're in a "delusionship," the word delusional has become a prominent part of cultural slang. But I'm not sure it should be. With these terms being so ...