Over at CDL Deborah has argued that being trans is not something you can run away from, but it must be up to the individual crossdreamer or transgender person to find out who they are.
"some say that if you think you might be transgender then you are. being transgender - trans for short - is just feeling that you don't fit in with the established gender binary. i would add that it is a personal, instinctive feeling, not an intellectual or political position.
trans is about subjective feelings. it is objectively true that you are trans if you have the subjective feelings. this is odd, as it can feel like a choice, like you can be not trans by not accepting the feelings. but you are trans - like it or not, however you respond to or interpret the feelings."
However, there are trans persons who feel a strong need to define the "transness of others".