I really get tired of educating people who will not do the work for themselves. Nothing personal. If you go to the major medical institutions, you will see the research for yourself. Check NIH. Check the Cleveland clinic. Check the Mayo clinic. Check UCSF. There are any number of resources. You appear to be drawing information from pseudo scientific institutions that push fictions that seem reasonable on their face, but have no basis and facts. Psychologist have been doing research on both children and adults for years. There are tests that males and females Answer questions on differently. There is a gender difference. Not surprisingly, transgender individuals answer in the same way as the gender with which they identify, not what they appear to be due to external sexual characteristics. Cleveland clinic has been doing pet scans on transgender individuals and seeing how their brains light up upon being exposed to stimuli that males and females respond to differently. Again, not surprisingly, transgender individual brains respond in the same way that those of the gender they identify with do. This is a physiological response. These are just two examples. As I previously said, there are over 4000 studies in different disciplines that confirm the reality of trans individuals from a biological standpoint.

Let me turn this around. You cite specific facts that you posit to prove the truth of your skepticism. What are your sources?