Then on the right-hand side of the piece of paper, I said, okay, we have Einstein's equations in general relativity
Now, suppose I could engineer Einstein's equations the way we engineer Maxwell's equations for electromagnetic effects.
what Einstein's equation, if you could engineer them.
And so he used Einstein's equations to say, okay, under what conditions could we do a warp drive?
I mean, there's no way that even, OK, or give Einstein an iPhone back in 1945 or something.