Old Coin

In a certain archeological study, a person comes out with the finding of an old coin with the inscription '30 B.C.' He announces to the world of scientists that he is in possession of a very rare coin and shows it to them. However one fellow scientist disproves the veracity of his statement and exposes his fraudulent activities. How does he know that the coin is fake and not original?


Answer:

If the coin with the inscription '30 BC' is real, the the people who minted the coin must have known that after a period of 30 years, jesus would be born. This is clearly impossible. This proves the man's claim as wrong and untrustworthy.