My point was that you can't, even in mathematics; for example. the (ludicrously simple) mathematical statement "2 + 2 = 4" is, in some sense, incomplete, because it does not also state all the other true facts about addition (let alone other true facts such as, say, the current temperature). I think of Douglas Adams's description of the problem with someone who took utterly literally the injunction to tell "the truth, the whole truth, and nothing but the truth" (and so was still going at it, years later).