T-shirt designs for logicians and fans or students of logic.

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$24.88
$24.88
A soft and lightweight T-shirt featuring a transgender variant of our "Love Everyone" design. This design uses the universal quantifier symbol (∀) and employs a pride heart design as a predicate sy...
$24.88
$24.88
A soft and lightweight T-shirt featuring an allyship variant of our "Love Everyone" design. This design uses the universal quantifier symbol (∀) and employs a pride heart design as a predicate sym...
$24.88
$24.88
A soft and lightweight T-shirt featuring a version of our "Love Everyone" design. This design uses the universal quantifier symbol (∀) and employs a pride heart design with the ubiquitous rainbow ...
$24.88
$24.88
A soft and lightweight tee 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 in classical logic th...
$24.88
$24.88
A soft and lightweight tee 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 foundational axiom in classi...
$24.88
$24.88
It's a phrase that is usually used in ways that make philosophers cringe. This silly shirt about the logical fallacy known as 'begging the question' is sure to get a reaction from those who know th...
$24.88
$24.88
The raven paradox notes that, at least formally, if seeing a black raven is evidence for the claim "all ravens are black", then so is any observation of anything that is neither black nor a raven. ...
$28.50
$28.50
In this play on symbolic logic, the universal quantifier is used with a heart as a predicate symbol, saying "for every x, love x", or, "love everyone". Together with the rainbow imagery, this can b...
$24.88
$24.88
In this play on symbolic logic, the universal quantifier is used with a heart as a predicate symbol, saying "for every x, love x", or, "love everyone". Together with the rainbow imagery, this can b...
$24.88
$24.88
This is a little bit of teasing for those excited about logical pluralism and its applications. Paraconsistent logics are those that deny the classical law of non-contradiction, where 'P' and 'not ...
$31.50
$31.50
The raven paradox notes that, at least formally, if seeing a black raven is evidence for the claim "all ravens are black", then so is any observation of anything that is neither black nor a raven. ...
$31.00
$31.00
In this play on symbolic logic, the universal quantifier is used with a heart as a predicate symbol, saying "for every x, love x", or, "love everyone". Together with the rainbow imagery, this can b...