I never meant to insinuate that I could spot 100% of transpeople 100% of the time, nor did I say that anyone could for that matter. I said that there are little things that differentiate the genders and that it is possible to recognize even a very passable transperson from a cisperson. I even said that just because some of these subtleties exist in a fictitious internet picture, we "shouldn't assume...". So I clearly never meant to say that these things should be taken as hard evidence. These subtleties I am talking about noticing are at least more obvious to the transpeople whom I have talked to (IRL and online) as well as myself since many of us notice these things readily in our own features and they cause us a bit to good deal of insecurity.