The speaker doubts that any simulated environment for economically valuable work involving people and the real world could prevent an AI from eventually realizing it is in a simulation if it tried hard enough.

“don't think there's any environment I could make where”

“it's supposed to emulate real economically valuable work which requires you know interacting with other people and requires interacting with the world i don't think there's any such environment where i can make where if you were in that environment you”

“would not realize with enough effort that you are in that environment and”