A: Scratch Paper!
Because he couldn't see that well.
It was on paws
He forgot his Loggins
HER: um... ME:writing bad at geo-
A pun is a play on words, while Cliff's notes are a word on plays
In a skeptic tank. (Note: I just made up this joke earlier today. I'm not 100% sure the joke is obvious feel free to suggest a better wording!)