Necessary and Sufficient Causes
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State
A necessary cause must be present for the effect; a sufficient cause guarantees it. Most causes of interest are neither alone — they're contributing conditions.
Show
Oxygen: necessary for the fire, sufficient for nothing.
Watch for
"The" cause is usually a selection from a causal field, picked out by our interests. The insurance report and the fire marshal may both be right.
Builds on
Unlocks
- Nothing yet depends on this.