Comic #5566: actually
Description
Here’s the transcription of the comic:
Panel 1: Character 1: "CURSE YOUR INCESSANT PEDANTRY, YE SCURVY DOG!"
Panel 2: Character 2: "DOGS CAN'T GET SCURVY BECAUSE THEY GENERATE THEIR OWN VITAMIN C."
Panel 3: Character 1: "YOU'LL WALK THE PLANK FER THIS!"
Panel 4: Character 2: "YOU KNOW PIRATES NEVER ACTUALLY DID THIS!"
[Image of a pirate ship in the background with a person standing on a plank.]
The comic is from smbc-comics.com.