Letter in last weeks New Scientist (ok, I know I’m a bit behind - only got the chance to read this on the train to Birmingham yesterday) -

” In the interests of full disclosure and the safety warnings that so intrigue you, you should have alerted your readers not to try to name ‘The category of un-named categories of interesting names”.

Bertrand Russell became almost suicidal about whether such a category would contain itself. Let not this problem spread beyond UK shores, by modern means of meta-categorisation”.

full letter at http://www.newscientist.com/