Sorry to quibble about the title (here), but I thought it was going to be that which one you got was undefined, up to the interpreter, or constant but implement

Sorry to quibble about the title (here), but I thought it was going to be that which one you got was undefined, up to the interpreter, or constant but implementation defined, or something. I suppose it's true that there are 'multiple ambiguous' chains, but it's resolved by making it a syntax error. Maybe that's just my reading though, caffeine deficient at the moment!