Douglas Adams, "Mostly Harmless" Browse All Authors Famous Quotes by Douglas Adams, "Mostly Harmless" A common mistake people make when trying to design something completely foolproof is to underestimate the ingenuity of complete fools. Douglas Adams, "Mostly Harmless" The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair. Douglas Adams, "Mostly Harmless"
