by My definition of overthinking is as follows!
I have a situation or a problem I need this solve. The way my brain works, is I go over every possible outcome for the solution to the problem. Then when I have come to a conclusion, I weigh the percentages of each possible outcome to come to fruition! the most likely outcome is what I prepare for.
yet I have also prepared for all the other various outcomes that my brain was able to think up! that way if something unexpected happens, I have prepared for that…..
I call it playing mental chess…..