Testing shows the presence, not the absence of bugs.

I now have had my foggy crystal ball for quite a long time. Its predictions are invariably gloomy and usually correct, but I am quite used to that and they won't keep me from giving you a few suggestions, even if it is merely an exercise in futility whose only effect is to make you feel guilty.

Are you quite sure that all those bells and whistles, all those wonderful facilities of your so called powerful programming languages, belong to the solution set rather than the problem set?

If debugging is the process of removing software bugs, then programming must be the process of putting them in.

The use of anthropomorphic terminology forces you linguistically to adopt an operational view. And it makes it practically impossible to argue about programs independently of their being executed.

APL is a mistake, carried through to perfection.

If there is one 'scientific' discovery I am proud of, it is the discovery of the habit of writing without publication in mind.