Or the opposite. I successfully replicate in my lab, but the price on Yes is high, so I make a post about how there definitely isn't superconductivity, buy up a

Or the opposite. I successfully replicate in my lab, but the price on Yes is high, so I make a post about how there definitely isn't superconductivity, buy up all the Yes, and then say "Woops I made a mistake. It really does superconduct." OP is downplaying the shenanigans that can go on here. The only way to prevent it is some sort of SEC insider trading or market manipulation laws.