The "but for" test is useful when two or more forces, each of which is sufficient to bring about the harm in question, are actively operating.

Question

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The "but for" test is used to determine causation by asking whether the harm would have occurred "but for" the defendant's conduct. It is not suitable when multiple sufficient causes are present, as it may not clearly identify the actual cause.

The "But For" Test Is Useful When Two or More