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 in classical logic that, for any proposition, P, either P or its negation must obtain.
Black twill patch with white formula in threaded embroidery
3″ (7.6 cm) in diameter
26% cotton, 74% polyester
Attachment options: iron-on, sew-on, or safety pin