Reaching a hasty conclusion or judging something with little or no evidence.
A person who jumps to conclusions may believe that they know what others are thinking and feeling.
Example: She came home with a frown on her face, so she must be angry with me.
Tip: Try carefully examining the evidence for and against your prediction.
Reframe: Although it is possible that she might be angry with me, it is equally likely that something unpleasant happened at work or on the way home. I don’t know for sure unless I ask.