'Dead Rise' in the Bible

And we are indeed found false witnesses of God; because we testified according to God that he raised Christ: whom he did not raise, if then the dead rise not.

But if the dead rise not, neither is Christ risen.

Then what shall they do who are baptized for the dead? If the dead rise not at all, why are they also baptized for them?

If after the manner of men I have fought with the wild beasts in Ephesus, what profit is it to me? If the dead rise not, let us eat and drink, for to-morrow we die.