Thats the wrong definition of WIFOM.

WIFOM stems from The Princess Bride. Its basically a leveling thing. Its the circular reasoning that results from trying to determine the choices of an opponent who acted with full knowledge that their behavior would be subject to scrutiny. (Definition stolen from mafiascum)

Also, example stolen from mafiascum: Suppose your a cop, chasing a criminal. He could have escaped by highway or street. As the crook, which do you take? As the cop, which do you think the crook would take? Knowing that, which does the crook take? Knowing that, which does the cop think the crook would take etc etc etc.