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 gold formula and border in threaded embroidery
- 3″ (7.6 cm) in diameter
- 26% cotton, 74% polyester
- Attachment options: iron-on, sew-on, or safety pin