Yes and no. I really should wait for Ben Jos' more authoritative answer, but the basic idea is that the dips are encoded into every frame of an .inp file. Someone can look at the source for a game's driver and determine what 'proper' (default in most cases) settings would be recorded as. Then it's just a matter of verifying that the .inp in question matches up with it. The editors use a tool that assists in tournament games. For most of the games, however, stuff like that is usually spotted by experience with the game or just really obvious sort of things like having the wrong number of lives.(posted 8438 days ago)The MAME Olympiad movie rocks, by the way. As does Ms. Pac-Man's singing performance.
Brian McLean