[neerajsi]

You're quite right. Science requires the skepticism to apply the stress to theories needed to make them strong. I'm assuming Einstein tried to raise objections using evidence to the contrary and alternative explanations.

[n4r9]

Along with Podolsky and Rosen he formulated one of the original quantum thought experiments to challenge the accepted conventions: https://en.m.wikipedia.org/wiki/Einstein%E2%80%93Podolsky%E2...

This in turn inspired Bell's theorem, and eventually quantum information theory.