Question of the Day!

(1) If the results were incorrect, then a mistake, so redo and find out what went wrong;
(2) if no serious injuries or property damage, maybe clumsiness or misinterpretation of the input data, so possibly a minor mistake -- repeat carefully with increased caution, checking each step, to find out what went wrong;
(3) major injuries/corpses or major property damage? You're screwed.