About trans and sports This week I read an interesting article about Martina Navratilova's opinion about whether is a good idea that trans women compite against women in sports. You can find the article in the following page: https://www.theguardian.com/commentisfree/2019/mar/06/sport-trans-martina-navratilova. First and just to be clear I certainly support LGTB community and I think that they have every right to live their lifes as they want. However, from my point of view and thinking as a statistician, I think we can have two new categories in sports: trans men and trans women. The reason of that is that before we used to see only one variable : sex, with only two categories man and women, according to the biological sex at birth, and we divided the sports based on that. Nowadays we have learned that there is another variable, gender with two categories male and female. Then, I can see two different variables to describe people. sex and gender. Therefore, I think now we have 4 categories defined by them: 1. Man - Male 2. Man - Female 3. Women - Malen 4. Women - Female There are strong differences between those groups based on the physical strength and other biological and mental features. So, why don't we have these categories also in sports? This would be fair for everybody as we would not have man - female compiting with women - female with disadvantage for the last ones. I think I am not being disrespectul with trans sportwoman. I am not denying their rights and I think I am recognizing them as they are. In the future we might see another variable relevant to the sports and there could be more categories too.