Marleena, then they already KNOW and why would they want to ask the question initially? And, how could confirm that they are or they are not since you are not and you have no way of verifying. The problem is that it is a loaded question. It is not the same as asking a doctor if you are sick. He can do blood work or something else and confirm or deny your assertion of being ill. A person who needs to ask wants someone else to be responsible for the naming, and if it isn't true, it becomes THEIR fault. A person who asks me if I'm a patriot may be telling me more about themselves then they will find out about me. Talk the talk, walk the walk. I realize that sometimes people have self doubt--we all do at some point in our lives about something. Think of a person asking themselves if they are gay. They should be asking themselves if they get turned on by someone of their own sex. If yes, then there is pretty much the answer. So "Am I TS?" If if feel in my being that I should be a woman throughout the rest of my life, that pretty much answers the question. Another voice isn't needed to confirm that.
Then there is always self-delusion. I can't admit to myself that I'm gay, and so I'd really rather look like a woman and find a man. This is what I have recently read about one study group of about less that 100 people. 60% said they couldn't see themselves as gay, so they decided to be transsexuals. True, it doesn't represent the entire population but it is a representation of thinking by people who are in a state of gender confusion.