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P

permutation

an arrangement of distinguishable objects in a definite order. For example, the objects A and B have two permutations, AB and BA

Precipitation

Rain, snow, sleet, fog, hail.... anything that comes from the sky?

premise

A statement assumed to be true

principal

The original amount of money invested or loaned.

proof

A mathematical arguement showing that a statement is valid in all cases, or that no counterexample exists