Is Christ divided? Was Paul crucified for you? Or were you baptized in the name of Paul?

I thank God that I baptized none of you except Crispus and Gaius,

so that no one may say that you were baptized in my name.

(I did baptize also the household of Stephanas. Beyond that, I do not know whether I baptized anyone else.)

For Christ did not send me to baptize but to preach the gospel, and not with words of eloquent wisdom, lest the cross of Christ be emptied of its power.

and all were baptized into Moses in the cloud and in the sea,

For in one Spirit we were all baptized into one body—Jews or Greeks, slaves or free—and all were made to drink of one Spirit.

Otherwise, what do people mean by being baptized on behalf of the dead? If the dead are not raised at all, why are people baptized on their behalf?