Charles Liu

So the question then has since moved on.

And clearly, even back then, Niels Bohr wasn't saying that the universe didn't exist if there were no observers.

It's just we didn't know what the universe consisted of until it got measured.

But that has been taken to sort of its logical conclusion and by saying that, yes, actually observers are necessary.

And you'll find physicists today that stick to that point.

If you don't have someone seeing what's there, it's not actually there.

I remember also something that you did a long time ago, Neil, about reality in our brains.

How the complexity in our neurons and the neural nets and so forth and consciousness and things like that rivals the complexity on the large scale of the universe itself in the galaxies and the stars and things like that.

On the large scale.

And so if you take that into the next level, before quantum physics was established, there was a philosopher named Rene Descartes, whom you've probably heard of before.

He's named, well, the Cartesian plane, the XY axes that you guys all did in algebra back in the day.

day, right?

Well, okay.

This guy Descartes basically said that reality is only conveyed to our brains through our senses.

So each of us actually lives within a reality that is distinct from every other reality that is visible.

So in your brain, Chuck, and in my brain and Neil's brain,

That's actually one of the big questions about that.

The Young's two-slit experiment, which has now turned into a big part of explaining so-called wave-particle duality.

Yeah.

is one of the manifestations of this.