Give me credit, if through it you gain wealth and fame.
Yet if causes you trouble, I won't take the blame.
Don't be evil, but create what is good and fair.
Line 2 is vague: how much wealth? How much fame? And how much credit?
Line 4 is also vague: what is "evil"? What is "good and fair"? Is a pharmaceutical website "good and fair" (they save people's lives!) or "evil" (they put profit above saving people's lives!)?
If I need to ask a lawyer just to find out whether I can use some code... I won't ask the lawyer, I just won't use the code.
Well said. I think the license is a good "spirit of the agreement" breakdown but it falls flat when it comes to expressly defining what is/isn't, must/mustn't, etc.
However - as an unrelated point - wouldn't "unfree" licenses be better (given the theoretical case we can decide with some certainty what is good or evil)?
"what is good and fair" has no legal definition in any jurisdiction that I know of, which would scare away any lawyer with half a brain.