Einstein has to speak at an important science conference.
On the way there, Einstein tells his driver, who looks a bit like him
“I’m sick of all these conferences. It is always said the same things over and over! e=MC blah blah blah, I need a break.”
The driver agrees:
“You’re right. As your driver, I attended all of your lectures. In theory, I can give your speech in your place.
“That’s a great idea!” says Einstein.
“Let’s switch places then!”
So they switched clothes, and as soon as they arrived, the driver dressed as Einstein went on stage and started giving the usual speech, while the real Einstein, dressed as the car driver, relaxed in the back of the auditorium.
But in the crowd, one scientist wants to impress everyone and thinks of a tricky question to stump Einstein.
So the scientist stands up and interrupts the conference.
“Excuse me! Professor Einstein – Given the success of quantum mechanics in describing subatomic particles, how would you reconcile the apparent incompatibility between general relativity, which describes gravity on a large scale, and quantum field theory?”
The whole room goes silent, holding their breath, waiting for the response
The driver looks at him, dead in the eye, and says: “Sir, your question is so easy to answer that I will let my driver reply.”