The source presents co-variation as evidence for identifying a cause. Its strength depends on context: co-variation can support a causal hypothesis without automatically proving causation in every case.
Both observations might depend on a third factor. A feature could be necessary but not sufficient for the judgment.
Accordingly ask whether other relevant factors were investigated, whether counterexamples exist, and whether the judgment really depends on the proposed common feature.
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Analogy: Original and New Cases, Common Cause, Co-variation and Elimination
The source presents co-variation as evidence for identifying a cause. Its strength depends on context: co-variation can support a causal hypothesis without automatically proving causation in every case.
Both observations might depend on a third factor. A feature could be necessary but not sufficient for the judgment.
Accordingly ask whether other relevant factors were investigated, whether counterexamples exist, and whether the judgment really depends on the proposed common feature.