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T-shirts, hoodies and other accessories with jokes and imagery about logic, the philosophical study of valid reasoning.
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$24.85
$24.85
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...
$7.49
$7.49
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...
$7.16
$7.16
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...
Love Everyone: Mug - white
Sale
$9.49
$10.98
$9.49
Love Everyone: Mug - white
Sale
$9.49
$10.98
$9.49
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...
$12.73
$12.73
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. ...
Paradox of the Ravens: Philosophy Mug - white
Sale
$9.56
$10.98
$9.56
Paradox of the Ravens: Philosophy Mug - white
Sale
$9.56
$10.98
$9.56
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. ...
Begging the Question: Philosophy T-Shirt - orange
Sale
$19.98
$22.68
$19.98
Begging the Question: Philosophy T-Shirt - orange
Sale
$19.98
$22.68
$19.98
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...
Law of Excluded Middle: Logic T-Shirt - olive
Sale
$19.98
$22.68
$19.98
Law of Excluded Middle: Logic T-Shirt - olive
Sale
$19.98
$22.68
$19.98
Just the basics: This T-shirt carries a formula of symbolic propositional logic exemplifying the law of the excluded middle. In English, the symbols read as, for some proposition P, "either P or no...
Unisex Jersey T-Shirt by Bella + Canvas - asphalt
Sale
$19.98
$22.68
$19.98
Unisex Jersey T-Shirt by Bella + Canvas - asphalt
Sale
$19.98
$22.68
$19.98
Just the basics: This T-shirt carries a formal symbolism for the law of non-contradiction in propositional logic. The formula reads as "not both P and not-P". For any proposition, P, it is a founda...
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