Insufficient Reason Principle
A principle also called the Indifference Principle which was first enunciated by Johann Bernoulli. 
The insufficient reason principle states that, if we are ignorant of the ways an event canoccur and therefore have no reason to believe that one way will occur preferentially to another, it will occur equallylikely in any way.
- Nagel Point
- Naive Set Theory
- Napierian Logarithm
- Napier's Analogies
- Napier's Bones
- Napier's Constant
- Napier's Inequality
- Napkin Ring
- Napoleon Points
- Napoleon's Problem
- Napoleon's Theorem
- Napoleon Triangles
- Nappe
- Narcissistic Number
- Nash Equilibrium
- Nash's Theorem
- Nasik Square
- Nasty Knot
- Natural Density
- Natural Equation
- Natural Independence Phenomenon
- Natural Invariant
- Natural Logarithm
- Natural Measure
- Natural Norm