Triple enumerations are a powerful tool of persuasion in rhetoric. For some reason, triple arguments have a pleasing rhythm, they are convincing, and they work better than single or double arguments. The number three shows up everywhere—in titles, sayings, and rhetoric.

Liberty, equality, fraternity
Veni, vidi, vici
The Holy Trinity
The Three Little Pigs
The Three Musketeers
The three circles of hell
And so on.

What is it about the number three that gives it such persuasive power? How can we use it? How do we build arguments in triples?