Give Uncle Albert a break. He didn’t have Al Gore and his internet nor computers.
What he did was with pencils, paper, chalk and a blackboard.
Do you think any of our millenials could duplicate that today (except the some India, Red China, or Israel)?
But are you or I in a position to make this statement?
That is, are you, in particular, in a position to pass judgment on his Special and General Theories of Relativity?
If so, let's hear it.