Ideas from 'The Establishment of Scientific Semantics' by Alfred Tarski [1936], by Theme Structure
[found in 'Logic, Semantics, Metamathematics' by Tarski,Alfred [Hackett 1956,091514476x]].
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3. Truth / F. Semantic Truth / 1. Tarski's Truth / a. Tarski's truth definition
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'"It is snowing" is true if and only if it is snowing' is a partial definition of the concept of truth

5. Theory of Logic / A. Overview of Logic / 6. Classical Logic
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A language: primitive terms, then definition rules, then sentences, then axioms, and finally inference rules

5. Theory of Logic / I. Semantics of Logic / 1. Semantics of Logic
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Semantics is the concepts of connections of language to reality, such as denotation, definition and truth

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A language containing its own semantics is inconsistent  but we can use a second language

5. Theory of Logic / I. Semantics of Logic / 4. Satisfaction
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A sentence is satisfied when we can assert the sentence when the variables are assigned

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Satisfaction is the easiest semantical concept to define, and the others will reduce to it

5. Theory of Logic / K. Features of Logics / 2. Consistency
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Using the definition of truth, we can prove theories consistent within sound logics
