squashed check ins/trilogy shoveling

Individual "check in" commits can be squashed before they get sent to
the server—a stunning innovation.

The vision is a "loose" trilogy (three related posts, but that can be
read independently): "Sexual Dimorphism" about my experiences,
"Blanchard's Dangerous Idea" on why it seems plausible that a lot of
trans women are "like me" even if I don't have direct access to their
experiences, and "A Hill of Validity in Defense of Meaning", about my
remaining grudge against the "rationalist" "community".