> you'd need to be unable to distinguish between a measured/unmeasured particle This is true. There is no way to tell if a measurement you do happened on an en

> you'd need to be unable to distinguish between a measured/unmeasured particle This is true. There is no way to tell if a measurement you do happened on an entangled particle or on a "free" one. You can only tell in retrospect, when you correlate results, which requires classical communication.