[JangoSteve]

You are absolutely right about the title. Though, I should probably clarify, the more accurate title would be "Nobody knows what they're doing all the time." That was the intent when I wrote it, but it could be argued that if the title weren't a bit sensationalist, we may not be having this meaningful discussion with points and counterpoints on HN right now.

EDIT: Actually "all the time" doesn't quite cover it, I'd say it's "most of the time".