Rule of inference
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Rules of inference are ways of deriving conclusions from premises. They are integral parts of formal logic, serving as the logical structure of valid arguments. If an argument with true premises follo
George Boole (1815–1864) made key contributions to symbolic logic in general and propositional logic in particular.
As one of the founding fathers of modern logic, Gottlob Frege (1848–1925) explored some of the foundational concepts of first-order logic.
The rules of inference in Aristotle's (384–322 BCE) logic have the form of syllogisms.
Logic
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Logic is the study of correct reasoning. It includes both formal and informal logic. Formal logic is the study of deductively valid inferences or logical truths. It examines how conclusions follow fro
Rule of inference
…Rules of inference are ways of deriving conclusions from premises. They are integral parts of formal logic, serving as the logical structure of valid arguments. If an argument with true premises follows a rule of inference then the conclusion cannot be false…
Young America's dilemma: Shall I be wise and great, or rich and powerful? (poster from 1901). This is an example of a false dilemma: an informal fallacy using a disjunctive premise that excludes viable alternatives.
Bertrand Russell made various contributions to mathematical logic.
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