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T-shirts, hoodies and other accessories with jokes and imagery about logic, the philosophical study of valid reasoning.
$12.24
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$12.24
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An embroidered patch with a durable twill weave featuring the formal symbolism for the law of excluded middle in propositional logic. The formula reads as "P or not-P". It is a foundational axiom ...
$12.24
/
$12.24
/
An embroidered patch with a durable twill weave featuring the formal symbolism for the law of excluded middle in propositional logic. The formula reads as "P or not-P". It is a foundational axiom ...
$12.24
/
$12.24
/
An embroidered patch with a durable twill weave featuring the formal symbolism for the law of excluded middle in propositional logic. The formula reads as "P or not-P". It is a foundational axiom ...
$12.24
/
An embroidered patch made with a durable twill weave featuring the formal symbolism for the law of non-contradiction in propositional logic. The formula reads as "not both P and not-P". It is a fo...
$12.24
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An embroidered patch made with a durable twill weave featuring the formal symbolism for the law of non-contradiction in propositional logic. The formula reads as "not both P and not-P". It is a fo...
$12.24
/
An embroidered patch with a durable twill weave featuring the formal symbolism for the law of non-contradiction in propositional logic. The formula reads as "not both P and not-P". It is a foundat...
$42.00
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$42.00
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This design uses the universal quantifier symbol (∀) and employs a pride heart design with the ubiquitous rainbow Pride Flag as a predicate symbol meaning "I love" or "is loved". We covered these s...
