When John the baptist was decapitated Christ told some people who asked Him if He was the prophet Elias that, Elias has already come and people did what they did. And when Zachariah was it? Was visited by the angel Gabriel and announced that his son would be born with the "spirit and strenght of Elias". People even the apostles asked Christ if He was this or that prophet, are you Elias? Are you Moses?
So, why would they ask these questions if they didnt believe someone could be born again amongst us?
A bit more. When the pharisees sent the saducees to debate with Christ, He simply defeated them by turning their question on them. They asked, if a woman married five or seven husbands in this life, then in the next who is she gonna be married to? Christ only told them i thought you didnt believe in next lives
But maybe im wrong and the original greek, aramaic, hebrew, dont say like that