Introduction to Logic¶
Copi, I. M., & Cohen, C. (1990). Introduction to Logic.
Cited by¶
1 citation across 1 artifact.
Each citation links to the sentence it supports in the citing article.
Domain-specific¶
- Slippery Slope
- Invoking "slippery slope" to name a real, evidenced escalation gets it backwards: where the dynamic is demonstrated, the fallacy dissolves and the right concept is the ratchet. Not reductio ad absurdum. Reductio is a valid form — deriving a contradiction from a premise by logical entailment to refute it.
This sourceA logic text presenting reductio ad absurdum as a general method that derives a contradiction and serves as indirect proof of validity.
Supported in partVerified against the work's full text
“Here again we use the general method of [reductio] ad absurdum.”
- Invoking "slippery slope" to name a real, evidenced escalation gets it backwards: where the dynamic is demonstrated, the fallacy dissolves and the right concept is the ratchet. Not reductio ad absurdum. Reductio is a valid form — deriving a contradiction from a premise by logical entailment to refute it.
Verification¶
Does it exist? Not checked yet. This entry carries no identifier to resolve. It was extracted from the citation as written in the article, normalized, and deduplicated against the rest of the registry.
Does it back the claim? Read against the text for 1 of 1 citation: 1 supported in part. Each verdict is shown under its citation below, with what in the work backs the sentence.
Support is checked per citation rather than per work — the same source can be cited soundly in one article and wrongly in another. Per-citation recording began recently, so a citation with no recorded check is a gap in the record rather than evidence it went unchecked.
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Registry ID ref:64d9f29e1e2b · see in the full table