sanity check: n. [very common] 1. The act of checking a piece
of code (or anything else, e.g., a Usenet posting) for completely
stupid mistakes. Implies that the check is to make sure the author
was sane when it was written; e.g., if a piece of scientific
software relied on a particular formula and was giving unexpected
results, one might first look at the nesting of parentheses or the
coding of the formula, as a `sanity check', before looking at the
more complex I/O or data structure manipulation routines, much less
the algorithm itself. Compare reality check. 2. A run-time test,
either validating input or ensuring that the program hasn't screwed
up internally (producing an inconsistent value or state).
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