Rule of Three
Group ideas in threes - three points, three examples, three takeaways. Three is the smallest number that makes a pattern and the largest most people hold a...
Summary
Group ideas in threes - three points, three examples, three takeaways. Three is the smallest number that makes a pattern and the largest most people hold at once.
Origin
Rhetorical tradition (the tricolon) - used since antiquity.
Structure
Three of whatever matters: points, examples, takeaways.
When to use it
You want memorability; summaries, takeaways, and section design.
In Nalanda
Cap key points per slide near three; three concepts per module; three closing takeaways.
Notes & tips
Pitfalls to avoid. Forcing a weak third item to complete the set; overusing it until it feels gimmicky.
See also
Minto Pyramid Principle - PREP (Point, Reason, Example, Point)