I would be most gratefull, if someone could verify my solution to this problem.
1) Of Aaron, Brian and Colin, only one man is smart. Aaron says truthfully: 1. If I am not smart, I will not pass Physics. 2. If I am smart, I will pass Chemistry. Brian says truthfully: 3. If I am not smart, I will not pass Chemistry. 4. If I am smart, I will pass Physics. Colin says truthfully: 5. If I am not smart, I will not pass Physics. 6. If I am smart, I will pass Physics. While I. The smart man is the only man to pass one particular subject. II. The smart man is also the only man to fail the other particular subject. Which one of the three men is smart? Why?
I would say that it could have been any one of them, as the implications in every statement are not strong enough to disprove the statements I,II. But I'm not sure if my solution is enough, as I'm not sure what kind of logic it is.