Proving Mahaveer Swami was omniscient

Conversation in between two persons to find whether Mahaveer really exisited and omniscient:

Non Believer: How do we know whether Mahavir Swami really existed?

Believer: He did. People during those times saw this and passed it on to the new generations.

Non Believer: It may have happened that some one created just hype, and there was actually nobody with the name Mahavir in those times.

Believer: Just imagine if we want to do that kind of thing in current time, would we be able to do it? Lets say we want to create an imaginary person 'XYZ' and propogate around that XYZ exists. It will not be possible, since people will be able to figure it out.

And let us say we are able to succeed in propagating it, then there would be a set of people who would not agree with us without really seeing 'XYZ', and would create scriptures telling that either XYZ does not exist, or not seen by the masses. None of above things happened to Mahavir. Nobody refuted his existence. The contemporary schools of religions like Buddhism and Hindu schools accpeted his exisitence. Hence there is no question that he really existed.

Non Believer: Okay, I agree that he exisited. But how do I assure that he was omniscient.

Believer: Okay.. Let us imagine in current times a person 'ABC' who is actually not omniscient, but he himself starts propagating that he is omniscient. In that case there would be three ways people would react to it:
a. One category is people who will start worshipping him.
b. Second category is people who will outrightly reject it, and do not agree to it.
c. Third category is peope who will get curious and go to meet him to test his omniscience.

The first category of people will start following him. Second category may talk about their rejectence around- but they are not worth listening to.

The third category will meet him and test his omniscience. And if they are not satisfied, they will propogate their doubts around. And disprove his omniscience based on the facts they saw. And this way the hyprocrisy of ABC will be known. And nobody will believe 'ABC'.

With Mahavir, there was no third category who disproved his omniscience. People who came over were able to see their previous and next 7 births. And were able to get satisfactory answers to all questions.

It is not at all possible for someone, who is not omniscient, to be on the earth and claim that he is omniscient. His hypocrisy will be broken very soon. One who is on the ground, has to be omniscient in order to claim that he is omniscient.

And the most important thing is - Arihants are the only living omniscient soul who stay on the ground. In no religion other than Jainism, had the omniscient preaching on the ground. They all have messengers or God in some other form coming down to the ground.