Monk [Monk surveys the jewelry store robbed by John Keyes the night before]
Adrian Monk: The killer wore a ski mask, ergo the killer was afraid he'd be recognized, ergo the killer must have worked here recently.
Lt. Randall Disher: [writes in his notepad] "Ergo the Killer". Is that Hungarian?
Captain Leland Stottlemeyer: His name isn't Ergo, Randy.

Hawaii Five-0 Danny: If the suspect dies, he loses the ability to speak—ergo, he's useless to us!
McGarrett: "Ergo"?

Law amp Order Special Victims Unit Benson: He's stalking her.
Cragen: Impossible. We don't have a stalking statute in New York, ergo there's no way to stalk anyone.

Scary Movie 3 I can't help it. It's very lonely in here. Ergo, I haven't been with anyone in a very long time, not counting myself. Or this chair. I call her Linda.

Big Bang Theory, The Sheldon: No, Mother, I could not feel your church group praying for my safety. The fact that I'm home safe does not prove that it worked. That logic is post hoc, ergo propter hoc. [lowers his voice] No, I'm not sassing you in Eskimo talk.

Veronica Mars Veronica: This is a bad idea.
Keith: No, it's not.
Veronica: You only think it's not because you came up with it.
Keith: Ergo, how could it be bad? Math, sweetie. Me + idea = good.

Alias Marshall: The good thing, slash, bad thing about living in Austria, smoking is not prohibited. Ergo you have just developed a smoking habit. [offers Sydney a cigarette]
Sydney: No, thanks.
Marshall: Good answer, just checking. It is actually a mag strip encoder.

Degrassi The Next Generation Craig: Look, unless your last name is Hendrix and you've come back to rock us from the grave; no solos while I'm singing.
Jimmy: Look, the music you have us playing is lame. Wedding bands are lame, ergo YOU'RE LAME!

A Walk to Remember by Nicholas Sparks [Landon lays out a blanket for he and Jamie to sit on as they stargaze]
Jamie: Are you trying to seduce me?
Landon: Why? Are you seducable?
Jamie: No.
Landon: Ah, I didn't think so. Ergo: [pulls something out of his backpack] A second blanket.

Jonathan Swift Words are but wind; and learning is nothing but words; ergo, learning is nothing but wind.