My two posts on Brendan Eich have attracted a commenter who wants us all to know he thinks homosexuality is a form of mental illness, and that therefore it is “tough love” to discriminate against them and deny their right to get married. He and I have been having a long back-and-forth discussion, in the most recent of which he said supporters of gay rights are guilty of “mental gymnastics” and “misrepresenting facts.” I have summarized my understanding of the relevant facts in my reply to him, but after thinking it over I’ve decided to promote it to a blog post as well. I’ll be interested in hearing your comments.