A common mistake that people make when trying to design something completely foolproof is to underestimate the ingenuity of complete fools.

He was a dreamer, a thinker, a speculative philosopher... or, as his wife would have it, an idiot.

Human beings, who are almost unique in having the ability to learn from the experience of others, are also remarkable for their apparent disinclination to do so.

If it looks like a duck, and quacks like a duck, we have at least to consider the possibility that we have a small aquatic bird of the family anatidae on our hands.

I love deadlines. I like the whooshing sound they make as they fly by.