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2. Sentence (mathematical logic) - Wikipedia

   en.wikipedia.org/wiki/Sentence_(mathematical_logic)

   In mathematical logic, a sentence (or closed formula) [1] of a predicate logic is a Boolean-valued well-formed formula with no free variables. A sentence can be viewed as expressing a proposition, something that must be true or false. The restriction of having no free variables is needed to make sure that sentences can have concrete, fixed ...

3. List of logic symbols - Wikipedia

   en.wikipedia.org/wiki/List_of_logic_symbols

   In logic, a set of symbols is commonly used to express logical representation. The following table lists many common symbols, together with their name, how they should be read out loud, and the related field of mathematics.

4. Propositional formula - Wikipedia

   en.wikipedia.org/wiki/Propositional_formula

   The predicate calculus goes a step further than the propositional calculus to an "analysis of the inner structure of propositions" [4] It breaks a simple sentence down into two parts (i) its subject (the object (singular or plural) of discourse) and (ii) a predicate (a verb or possibly verb-clause that asserts a quality or attribute of the object(s)).

5. List of valid argument forms - Wikipedia

   en.wikipedia.org/wiki/List_of_valid_argument_forms

   In order to evaluate these forms, statements are put into logical form. Logical form replaces any sentences or ideas with letters to remove any bias from content and allow one to evaluate the argument without any bias due to its subject matter. [1] Being a valid argument does not necessarily mean the conclusion will be true. It is valid because ...

6. Championnat International de Jeux Mathématiques et Logiques

   en.wikipedia.org/wiki/Championnat_International...

   This competition was created in 1987 and was called Championnat de France des jeux mathématiques et logiques (French competition for mathematical and logical games) at that time. Contestants could come from other countries, but the competition was entirely in French.

7. Propositional function - Wikipedia

   en.wikipedia.org/wiki/Propositional_function

   In propositional calculus, a propositional function or a predicate is a sentence expressed in a way that would assume the value of true or false, except that within the sentence there is a variable (x) that is not defined or specified (thus being a free variable), which leaves the statement undetermined.