Now if Christ is proclaimed as raised from the dead, how can some of you say that there is no resurrection of the dead?
12. But of Christ. He now begins to prove the resurrection of all of us from that of Christ. For a mutual and reciprocal inference holds good on the one side and on the other, both affirmatively and negatively — from Christ to us in this way: If Christ is risen, then we will rise — If Christ is not risen, then we will not...
Having confirmed the truth of our Saviour's resurrection, the apostle goes on to refute those among the Corinthians who said there would be none: If Christ be preached that he rose from the dead, how say some among you that there is no resurrection of the dead? Co1 15:12.
Commenting on 1 Corinthians 15:12-19
Now if Christ be preached that he arose from the dead,.... As he was by the Apostle Paul, when at Corinth, and by all the rest of the apostles elsewhere. How say some among you that there is no resurrection of the dead?