A silly error from a serious dude.
A one-question quiz.
Elaborations upon a blasphemy.
An origin fable.
One (slightly addicted) tweeter's advice.
An open letter to struggling students.
A surprising course review.
When silly questions matter.
Dilation savings time, and other ideas that can't be any worse than what we have now.
Cat? Easily defined. Integral? Less so.