Has TRUE always had a non-zero value?

Question

I have a co-worker that maintains that TRUE used to be defined as 0 and all other values were FALSE. I could swear that every language I\'ve worked with, if you could even

Answer 1

I'm not certain, but I can tell you this: tricks relying on the underlying nature of TRUE and FALSE are prone to error because the definition of these values is left up to the implementer of the language (or, at the very least, the specifier).