# Category:Tautology

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This category contains results about tautology in the context of propositional logic.

A **tautology** is a statement which is *always true*, independently of any relevant circumstances that could theoretically influence its truth value.

It is epitomised by the form:

- $p \implies p$

that is:

An example of a "relevant circumstance" here is the truth value of $p$.

The archetypal **tautology** is symbolised by $\top$, and referred to as Top.

## Subcategories

This category has the following 9 subcategories, out of 9 total.

### B

### C

### D

### E

### L

### T

## Pages in category "Tautology"

The following 12 pages are in this category, out of 12 total.