> No, the entire point of critiquing the author's qualifications is to break apart the idea that, because the author is well-spoken, they are therefore correct or even reasonable. If the author had declined to publish a miniature biography beside the article, then I would not have said anything. I haven't, for example, examined the rest of his body of work; I don't have any predictions to make about what else he may have written.

So basically you make an attack ad personam because it is effective way to win the discussion. It is not enough to dismantle his argument, you have also to make him unreliable source of knowledge. For my part, I haven't noticed the little bio, but I know it's a common practice to show a short info about the author under his article. It's a two edge sword, some readers may be impressed, some may feel like you.

> but it's completely wrong to say that humans have two biological sexes

So I guess saying that humans have two arms and five fingers per hand is also completely wrong. You know that due to strange genetic conditions, some people are born with more fingers, etc.? Some people get Down syndrome due to an extra chromosome, but still it's correct to say that humans have 20 chromosomes. It doesn't mean that there are no exceptions and doesn't dehumanize those exceptions.

I believe you're oversensitive in this area, but I guess you already told me why.