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Accessories for students, teachers, professors and others interested in philosophy, logic, math and science.
$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
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$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...
$4.10
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$4.10
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Our "love everyone" series features the logical formula ∀x❤x. A play on symbolic logic, we added a heart symbol as a new predicate to the usual symbolism in formal first-order languages to spell ou...
$10.00
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$10.00
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Have a philosopher, logician or mathematician on your gift list, but have no clue what to get them? (Or, have one on your list but don't get any of our jokes because you do something better with yo...
$14.44
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$14.44
/
Our "love everyone" series features the logical formula ∀x❤x. A play on symbolic logic, we added a heart symbol as a new predicate to the usual symbolism in formal first-order languages to spell ou...