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13 Cards in this Set
- Front
- Back
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Reasoning |
Start from a premise (data, experience, hypoth) and move toward a conclussion |
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Deductive reasoning |
Results in a conclusion that is necessarily true if the premises are true. |
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Axiomatic system |
Using clearly defined terms, and a process of deductive reasoning to establish proof, we reach propositions. |
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Proposition |
If (hypothesis) then (conclusion). |
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Proof |
If hypothesis then B; If B then C; Since C then D. Every step in proof must have a justification. |
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Exclusive "Or" |
One or another choice, but not both. |
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Inclusive "Or" |
At least one is chosen. |
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Negation |
Logical opposite. The negation of a true statement is a false statement. |
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Logical equivalance |
P,Q being logically equivalant means they always have same truth value (always true together, always false together.) |
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Argument |
Collection of statements, one of which is designated as conclusion of argument, with the rest designated as premises. |
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Valid |
"Truth preserving". If premises are true, then conclusion is necessarily true. |
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Factually correct |
premises are true |
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Sound (argument) |
Both valid and factually correct. |
