  An additional dimension to the frame problem is uncovered in (Fodor 1987), where the metaphysical justification for the common sense law of inertia is challenged. Although Fodor himself doesn't clearly distinguish this issue from other aspects of the wider frame problem, it appears on examination to be a separate philosophical conundrum. Here is the argument. As stated above, solutions to the logical frame problem developed by AI researchers typically appeal to some version of the common sense law of inertia, according to which properties of a situation are assumed by default not to change as the result of an action. This assumption is supposedly justified by the very observation that gave rise to the logical frame problem in the first place, namely that most things don't change when an action is performed or an event occurs.