“Mandy Baxter: Hey, you guys, check this out. Cogito ergo sum. I think therefor I am. Mike Baxter: René Descartes. Mandy Baxter: She was awesome. We learned about her in Philosophy, today. She was French so I don't really know why she was speaking Italian. Mike Baxter: Uh, money well spent. Mandy Bax…”— Kevin Hench, Mandy Baxter, Molly Ephraim, imdb.com
“It's like Descartes says, 'In order to determine whether we can know anything with certainty, we first have to doubt everything we know.'”— Gloria Calderon Kellett, Ted Mosby, Josh Radnor, imdb.com