What's the difference between a theorem and a ethereum Classic?

A theorem is a statement or proposition that has been proven to be true through mathematical or logical reasoning. An Ethereum Classic is a blockchain-based distributed computing platform featuring smart contract functionality. Ethereum Classic is a continuation of the original Ethereum blockchain, which was forked after a malicious actor exploited a vulnerability in the system. Ethereum Classic is a decentralized platform that runs smart contracts: applications that run exactly as programmed without any possibility of downtime, censorship, fraud or third-party interference.