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

It might be in reference to a result code of 0 which in most cases after a process has run, a result code of 0 meant, "Hey, everything worked fine, no problems here."