Question

What was the vital piece of evidence that professor he had really experienced a different reality?

Answer 1

Here is a answer....

Professor Gaitonde experienced the past after an accident and he was thinking about the Battle of Panipat and its consequences.

He can easily travel between the history and the present and he can go through the two different worlds.

According to the professor, he lived in a unique world which has different history and his idea might have been fine for speculation, but not for reality.

Hope this is usefull....