Sufficient Assumption

A sufficient assumption is an answer choice that, if true, guarantees the conclusion. Add it to the premises and the argument becomes airtight. It is allowed to bring in new information the argument never mentioned.

Example

For "Rex is a dog, so Rex barks," the sufficient assumption is "All dogs bark."

See also

• Necessary Assumption
• Assumption
• Conditional Statement

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Last updated October 12, 2026