Concepts and Ideas Presented in Sets of Three

Clarke's Three Laws
1st: An expert on a knowledge field will progressively become more obsolete to new predictions.
2nd: The only way to discover the limits is to push a bit more through them.
3rd: Any technology advanced enough will be undistiguishable from magic.
Dennett's Stances
Physical Stance (Most concrete), Design Stance, Intentional Stance (Most abstract)
Hegel's Dialectical Method
Thesis: Initial idea.
Antithesis: Contrasting idea.
Synthesis: Idea that conciliates both concepts, surpassing the apparent contradiction.
Trivium