The four devils

Someone scowls at you (once)

Generalisation (inferring the general from the particular): he is always scowling at me

Speculation (inferring the unseen from seen ): he is scowling at me because he hates me

Interpretation (giving the findings meaning): that means I am a bad person

Extrapolation (transferring the findings from one situation to many): other people think I'm a bad person

These four tools are to be used sparingly and only under adult supervision.