Math 2.0

Concept

Absorption (logic)

Summary

Absorption is a valid argument form and rule of inference of propositional logic. The rule states that if PP implies QQ, then PP implies PP and QQ. The rule makes it possible to introduce conjunctions to proofs. It is called the law of absorption because the term QQ is "absorbed" by the term PP in the consequent. The rule can be stated:

Further reading

  1. Wikipedia, page 34620850, revision 1275335102, Absorption (logic). adopted
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Changed4 November 2026

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