The answer is "NO" that's all there is to it. You have to think critically about all the questions that are asked. Okay you say the answer is Snow? Snow doesn't make guys pee. "Water"? Water may make GUYS pee, but why GUYS and not GIRLS? same thing for alcohol. There is nothing that makes "GUYS" pee and "GIRLS" not pee. We are human. Think CRITICALLY about the question. Stop trying to get around it with some magic answer to fufill all the criteria. If you can't fulfill even one answer to one of the questions, how is it you think you can fulfill all of them? Harvard students couldn't get it, and kids did get it because the answer is simply "NO". End of conversation. Move on to a new thread.