'Otherwise' in the Bible

(I also baptized the household of Stephanus. Otherwise, I do not remember whether I baptized anyone else.)

For the unbelieving husband is sanctified because of the wife, and the unbelieving wife because of her husband. Otherwise your children are unclean, but now they are holy.

Otherwise, if you are praising God with your spirit, how can someone without the gift say "Amen" to your thanksgiving, since he does not know what you are saying?

Otherwise, what will those do who are baptized for the dead? If the dead are not raised at all, then why are they baptized for them?