Ignoratio elenchi

What is it, to make a mistake?  To commit to a false analogy.  Most human error is a matter of tacitly importing presuppositions into a situation where they're irrelevant; most confusions are covert equivocations, where some slippage of meaning has occurred between the major and minor premises of a practical syllogism.  The result is the equivalent of making a chess move in checkers: you've inadvertantly imported abstractions from one domain into another, and the result is nonsense.  A well-designed interface does everything it can to prevent this; a poorly designed one encourages it.