# The weakening rule

## Idea

In logic, the weakening rule states that premises may be added to the hypotheses of a valid deduction while remaining valid. Along with the contraction rule and the exchange rule, it is one of the most commonly adopted structural rules.

## Statements

Exactly how this looks depends on the logic used.

Created on September 2, 2012 07:11:48 by Toby Bartels (98.23.143.147)