The tendency to believe falsely, after an outcome of an event is actually known, that one would have accurately predicted that outcome is known as a(n) bias.

hindsight          

Explanation:

In psychology, hindsight bias is defined as the tendency of a person to "overestimate" his or her capability of predicting a particular outcome that couldn't have been predicted in that way.

The hindsight bias tends to affect a person in a manner that how recently he or she has acquired specific knowledge related to something that eventually influences the recollection of his or her past information. It can often lead to developing "false thinking".

The question above describes "hindsight bias".

fast by juice wrld

explanation:

all cities have a governor

all cities are in states or provnies then country

all cities have people

difference

some are rich

some are poor

some are average