1. He may or may not own a skill cape 2. He may or may not have 99 smithing 3. He does come on this forum 4. He has in the excess of 1000 posts. 3. cannot be false because that would mean 4. is false, and only one is false. 1. and 2. are true because they cover both angles. . Therefore, it has to be four. In other words, the person has less than 1000 posts. Which only cuts it down to just a few thousand people. Those are horrible clues by the way. The only concrete thing you tell us is that he comes onto this forum. But I assume that he has a skill cape but he does not have 99 smithing (another 99)