Neo-Fregeanism revives Frege's logicist project, aiming to base mathematics on logic. It utilizes Hume's Principle and other axioms to ground…
A negative proposition asserts the absence or non-existence of something, or denies a property of an object. It's a fundamental…
Negation introduction is a natural deduction rule enabling the derivation of negation. It typically involves assuming the opposite and deriving…
Negation is a fundamental logical operation that reverses the truth value of a statement. It transforms true propositions into false…
The principle of the necessity of identity asserts that if two objects are identical, this identity holds true across all…
Necessity signifies a proposition that holds true across all possible worlds or under any conceivable circumstance. It's a fundamental concept…
The necessitation rule in modal logic states that if a proposition is provable (a theorem), then its necessity is also…
A necessary condition is a requirement for a statement to be true. It must be met, but it doesn't guarantee…
Multivalent logic, also known as many-valued logic, extends classical binary logic by incorporating more than two truth values. This allows…
Multi-modal logic extends classical modal logic by integrating multiple distinct types of modalities. It handles variations in necessity, possibility, knowledge,…