Cum Hoc Ergo Propter Hoc

Cum Hoc, Ergo Propter Hoc is a form of Non Causa Pro Cause that is committed to stating that one thing is the cause of another just because both are observed or occur together .-

A is observed whenever B

So A is the cause of B

It is a fallacy because it could be that, on the contrary, B was the cause of A, or that both were the consequence of a common cause, or even that there was no causal relationship or that it is very complex and indirect. -

example:

Inflation is caused by merchants who increase prices