This rule will not work every time (people do occasionally change their patterns of behavior), but persistence is the best guess: a person will most likely act tomorrow as they did today.
– If they did not go to the gym today, they likely will not tomorrow.
– If they cheated on you yesterday, they likely will tomorrow.
– If they did not get out of a losing trade yesterday, they likely will not tomorrow.
We are very good at telling ourselves that tomorrow will be different, that we will change our behavior tomorrow.
The odds suggest that we will not change, and that we will continue our familiar patterns.