(e.g. moon-landing, relativity theory, computers, science in general, etc).
Or nuclear weapon design. Chicago Pile-1 did work. Trinity did work. Little Boy did work. Burster-Able failed—but not catastrophically. Who knows if whatever the North Koreans cobbled together worked as intended—but it doesn’t seem to have destroyed anything it wasn’t supposed to. No-one has yet accidentally blown up a city. That’s something. Anyway, I’ll edit the post.
Or nuclear weapon design. Chicago Pile-1 did work. Trinity did work. Little Boy did work. Burster-Able failed—but not catastrophically. Who knows if whatever the North Koreans cobbled together worked as intended—but it doesn’t seem to have destroyed anything it wasn’t supposed to. No-one has yet accidentally blown up a city. That’s something. Anyway, I’ll edit the post.