Rule of Explosion/Explanation
- If you can prove a contradiction, you can prove anything.
Compare this with the colloquial expression:
- "If England win the World Cup this year, then I'm a kangaroo."
The assumption is that the concept of England winning the world cup is an inherent contradiction (it being taken worldwide as a self-evident truth that England will never win the World Cup again). Therefore, if England does win the World Cup this year, then this would imply a falsehood as the author of this page is certainly human.
This rule is denied validity in the system of Johansson's minimal logic.