I was thinking of adding a non-invasive fully mental telepathy system set up in someone else's simulated world but I found that there's no way for fully mental telepathy to be completely non-invasive.

The question I asked myself is:

Is a mental telepathy, where you mentally speak and share imagined things, but only what you want to mentally speak and share while not mentally speaking and sharing everything else that you are mentally speaking and imagining within every minute, possible?

The only way to make that work in the simulation would be for an ai program to be always reading everybody's brain data to deliver the parts of speech and parts of imagined things to who the ai is aware (because of the brain data) that the person wants to communicate with.

If that ai doesn't make it's presence (and what it does) known, then everyone in the simulation would just think it's non-invasive mental telepathy.

That world would make the task of teaching a class insanely difficult. A world of cheaters. And I guess it would be a gossip fest.

I'll make it so that, in that world or worlds like that, there is a device, the size of a pen, that was placed in everybody's house, that when used on anyone, magically turns telepathy on or off for that individual. It can also be used to check the status of if telepathy is already on or off for any individual. This will make cheating in school less doable. Whenever a person who isn't simulated uses the pen device, that person will be asked, by ai, for that person's consent for to have mental-privacy-invasive technology to be used on that person. If consent is given, then that person can use the telepathy system.

The telepathy system would only allow sharing of mental audio.