1. in logic, two propositions that cannot both be false but can both be true
Usage: logic; philosophy

Examples

• In formal logic, subcontraries represent a specific relationship between propositions.
• The statements 'some birds can fly' and 'some birds cannot fly' are subcontraries.
• Philosophy students learn to distinguish between contraries and subcontraries.
• Subcontraries differ from contradictories in that both can be true simultaneously.
• The professor explained how subcontraries function in the square of opposition.
• Understanding subcontraries is essential for mastering propositional logic.