### Logic

**Logic**can be symbolic or informal.

**Symbolic**logic examines the precise symbolic representation of logical concepts, the abstract relationships between these concepts, and the systematization of these relationships.

**Informal**logic involves the application of logical principles to assessment the types of informal arguments and claims that we encounter in daily life.

**Propositional**logic is a branch of

**symbolic**logic dealing with propositions as units and with their combinations and the connectives that relate them – if, then compound statements. Propositional Logic Terms and Symbols Proposition evaluator.

**Categorical**logic and categorical syllogisms are more concrete than is propositional logic – some, all, and/not. Venn diagram evaluator.

An understanding of Fallacies of Logic – recognized structural errors in argumentation – provides a shortcut to assessing the cogency of an argument. We most often encounter propositional arguments in daily life, while the logic of science, and of mathematics in particular, is more often categorical.

Labels: categorical logic, cogent argument, critical thinking, empirical, Fallacies of Logic, informal logic, logic, mathematics, propositional logic, science, symbolic logic

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