Smart Puns

Posts have been a bit long this week, so thought we'd do something shorter. Yesterday was a good pun day and I figured that would be a fine excuse for a post. The first is from my first year seminar and the second from a response to a paper I'm working on:

Of course, according to Kepler, the orbits of the planets are...

The author claims that analytic philosophy is sterile, yet Russell's "On Denoting" is not only seminal, but begat Strawson's response, "On Referring."

Got other good ones?