en_tn_condensed/1co/15/13.md

if there is no resurrection of the dead, then not even Christ has been raised

Paul knows that Christ has been raised and so infers that all who die will be resurrected. To say that there is no resurrection is to say that Christ has not been raised, but Paul has seen the resurrected Christ (1 Corinthians 15:8).

not even Christ has been raised

"God has not raised even Christ"