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...
The philosopher Ludwig Wittgenstein (1889-1951) was known for a stark division in his work, between an early and a late period that are sometimes treated as the works of two separate philosophers. ...
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...
If the solution to a problem can be verified quickly, does this mean it can be solved quickly as well? This is the core question that defines the P versus NP problem in computer science. The clas...
If the solution to a problem can be verified quickly, does this mean it can be solved quickly as well? This is the core question that defines the P versus NP problem in computer science. The clas...
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...
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 print this rain...
This cap plays on symbolic logic, using the universal quantifier symbol and with a heart as a predicate symbol, saying "for every x, x is loved", or, "love everyone". The hat is a classic trucker c...
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...
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 ...
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...
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...
