Unless

"Unless" introduces the one thing that prevents the outcome. "A unless B" means "If not B, then A." The fastest way to handle it is to negate the unless-clause and make it the sufficient condition.

Example

"The game is on unless it rains" means "If it does not rain, the game is on."

See also

• Conditional Statement
• Contrapositive
• Only If

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Last updated October 12, 2026