A logical fallacy that presents itself when someone incorrectly assumes that what caused an issue or problem with something mechanical, technical, or electronic (computers) was the result of whatever was changed last even though it is purely coincidental. This fallacy is commonly recognized by anyone from Auto Mechanics to IT Professionals due to the widespread decrease of brain capacity among humans in the world and corporate workforce today.
User: Yesterday you cleared my IE cache and now my emails are missing. Since that was the last thing that changed, you are automatically at fault.
IT Person: What I did has nothing to do with your emails missing; you probably deleted them or changed your view.
User: Nope, you are at fault, I'm calling your boss.
IT Person: (Thinks to him or herself) This is that flawed last thing changed logic. What a moron.