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| Defined as the science which has as its central problem the attempt to formulate principles for appraising arguments as valid or invalid. |
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| Consists of one or more propositions offered as evidence for another proposition. |
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| A statement which can be evaluated as true or false. |
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| Proposition/propositions offered as evidence in an argument. |
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| The proposition for which the evidence is offered. |
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| One in which it is claimed that if the premises are true, then it is PROBABLE that the conclusion is true. |
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| One in which it is claimed that if the premises are true, then the conclusion MUST be true. |
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| A deductive argument is this if its premises are related to its conclusion in such a way that if the premises were true, then it would be impossible for the conclusion to be false. |
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| A deductive argument is this if it's premises are related to its conclusion in such a way that if the premises were true, then it would e possible for the premises to be true and their conclusions false. |
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| A Valid argument in which all its premises are said to be True. |
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| Arguments which no parts are propositions. |
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| Arguments which parts are propositions. |
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| The negation of a true proposition is false, and the negation of a false proposition is true. |
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| A compound proposition composed of two propositions connected by the word "and". |
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| A compound proposition composed of two propositions connected by the word "and". |
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| A conjunctions component propositions. |
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| A conjunction is true if and only if both of its conjuncts are true. |
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| A compound proposition composed of two propositions connected by the word "or". |
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| A disjunctions component propositions. |
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| An inclusive disjunction is true if and only if at least one of its disjuncts is true. |
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| The truth or falsity of a proposition. |
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| Compound propositions in which the words "if...then" connect the component propositions. (antecedent precedes the conditional, consequent follows the conditional.) |
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| A conditional is false if and only if its antecedent is true and its consequent is false, otherwise it is true. |
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| A compound proposition in which the words "if and only if" are used to connect component propositions. |
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| A biconditional is true if and only if both its components have the same truth value. |
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