The issue is that we are not given "only one label is true" we infer it because that is how lots of those logic puzzles work.
I love and hate this kind of thing. A friend of mine is working on a presentation with a few problems like this in a row, and the impulse to just assume the new problem works the same as the previous one is annoying.
Posts
I love and hate this kind of thing. A friend of mine is working on a presentation with a few problems like this in a row, and the impulse to just assume the new problem works the same as the previous one is annoying.