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Logic Green Belt Exam
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Terms in this set (22)
False
A conjunction is false only when both conjuncts are false.
True
A disjunction is false only whenboth disjuncts are fase.
False
A conditional is false only when the antecedent and consequent are false.
False
A biconditional is true only when both of its sentences are true.
False
The final column under a contigent sentence will be all Fs.
False
If P and Q are both contingent, then they are also equivalent.
True
If P is necessarily true, and Q is necessarily false, then P and Q are inconsistent.
The conditional must be true.
When the antecedent of the conditional is false, don't even look at the consequent.
The disjunction must be true.
When one of the disjuncts of a disjunction is true, don't even look at the other disjunct.
The conjunction is false.
When one of the conjuncts of a conjunction is false, don't even look at the other conjunct.
Only rows that show true premises with a false conclusion matter.
When testing an argument for validity, don't complete entirely the rows in which the conclusion is true.
Only rows that show true premises with a false conclusion matter.
When testing an argument for validity, don't complete entirely the rows in which a premise is false.
True
A biconditional is always false when one of its sentences is true and the other is false.
True
If the antecedent is false and the consequent is false, then the conditional is ...
True
If P is true, then "It is not the case that it is not the case the P" is true as well.
True
The final column under a tautology will be all Ts.
A tautology is ALWAYS true
At all times, in all situations...
True
If two sentences are equivalent, then they imply each other.
False
If two sentences are consistent, then both sentences must be true.
True
If P implies Q, then P is true, Q must be true.
True
If P is necessarily true, the P is not contingent.
True
If P is necessarily true, then it is impossible that P is false.
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