By false positives I mean the following thing: assume the player solves a binary classification task while he is playing deciding which platforms can be jumped on and what belongs to the background (this should happen subconsciously). There you have true positives: platforms which look like platform, which you can also jump on. Then you have true negatives: the background looks like background and indeed: there is not collision. And then there are false positives (the fourth category would be false negatives) you an element in you background, which looks like something you can jump on. And this is very confusing to witness.
But: stuff like that can also occur in other games: for example imagine you have a whole lot of drawers and shelfs in a game, but only 1% of them is filled, this would also be annoying for the player if he would permanently open stuff, with the hope of finding something, without the satisfaction of actually doing so.