Category:Double Negation Introduction
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This category contains pages concerning Double Negation Introduction:
The Rule of Double Negation Introduction is a valid argument in types of logic dealing with negation $\neg$.
This includes propositional logic and predicate logic, and in particular natural deduction.
Proof Rule
- If we can conclude $\phi$, then we may infer $\neg \neg \phi$.
Sequent Form
- $p \vdash \neg \neg p$
Pages in category "Double Negation Introduction"
The following 9 pages are in this category, out of 9 total.
D
- Double Negation Introduction
- Double Negation Introduction/Proof Rule
- Double Negation/Double Negation Introduction
- Double Negation/Double Negation Introduction/Proof Rule
- Double Negation/Double Negation Introduction/Proof Rule/Tableau Form
- Double Negation/Double Negation Introduction/Sequent Form
- Double Negation/Double Negation Introduction/Sequent Form/Formulation 1
- Double Negation/Double Negation Introduction/Sequent Form/Formulation 1/Proof
- Double Negation/Double Negation Introduction/Sequent Form/Formulation 2