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What is Formal Logic?

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Formal logic is the practice of deriving logical conclusions from premises that are known or assumed to be true.
There are several types of formal logic that each rely on different systems of translating statements in natural language into a formal representation. Once represented in a formal language, logic can be evaluated for correctness and used to infer conclusions.
No system of logic can represent all the nuances of natural language. As a result, informal logic can evaluate ideas that are out of formal logic's reach. For example, traditional logic is based on an excluded middle such that it can't consider partial truths and grey areas.
Overview: Formal Logic
Function
Logic
Decision Making
Problem Solving
Artificial Intelligence
Definition
Formal logic is the practice of using inference to deduce conclusions from sets of premises.
Value
Determining the validity of an argument and deducing conclusions from what you know.
Related Techniques
Propositional Logic
Next: Excluded Middle

Logic

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