The reason that there is no evidence that can be scientifically examined is because it takes faith for a man to be born again. Salvation is through grace by faith. Where there is irrefutable evidence, there can be no faith.
At the return of Jesus every knee will bow and every tongue confess that Jesus is Lord. This includes all who have rejected Jesus. They will not however be born again because with irrefutable proof, there will be no faith in their confession.
