*Smiles* I probably could, although it requires interaction. 15 years of avid study on human behavior, and body language, has given me near supernatural empathic abilities. Voice tone, and body language, betray alot; especially if you ask probing questions. But just by passing someone, or upon first meeting them? Not unless they were open about it, and reflecting mainstream perceptions. But, never judge a book by its cover right? Snap judgments usually get you into trouble down the road, and I prefer accuracy.