[andai]

This is an old idea that there is great value in learning Lisp, or other "unusual" languages, because they force you to think differently about problems.

An amusing implication here is that the more "useless" a language is economically, the more valuable it's likely to be to learn it (for the effect it has on your mind).

[nr55544477777]

It’s amusing that you boil their comment down to “you should learn Lisp” based on a book recommendation that is about anything other than learning Lisp.

[gpjt]

That is an excellent point so long as you don't take it too far! Lisp/Haskell/Erlang yes. INTERCAL/Brainfuck less so...