Walk backwards into a wall. If everything turns black, you've stepped out of existence.

But they also say a watched pot doesn’t boil

That isn't a conspiracy, that is called quantum physics. Everything is a wave until it is observed at that point the waveform collapses and it becomes a particle.

Tell that to my toe every time I stub it. Or my shins when navigating my bedroom with the lights off.

Foveated rendering?

Is this about object permanence?

That's how video games work and video games are life, sooo... I can't and the baby is correct

Schrödinger's object.

Or I just look away and nullify their existence. Problem solved.

Babys first frustum culling