Why did the porcupine win the debate?

Its points were impossible to argue with.

Did You Know?

The joke plays on "points" meaning both the sharp quills covering a porcupine and the arguments someone makes in a debate! North American porcupines have about 30,000 quills on their bodies, each one a modified hair with tiny backward-facing barbs. Despite their prickly reputation, porcupines are actually gentle herbivores who'd rather climb trees and munch on bark than get into any real arguments.