Simon J. Kistemaker in BakerBooks New Testament Commentary - 1 Corinthians had the following to say about 1 Cor. 15:29 on page 558: “Throughout the centuries, explanations for verse 29 have been numerous and varied; many of them concern the phrases baptized for the dead and baptized in their behalf. In spite of all exegesis, a satisfactory solution appears to be elusive. I am not presenting a resume of every possible suggestion; instead I mention several attempts to clarify the text.” Kistemaker then provides a list of 7 possible explanations. The first explanation listed is, “** Living members of the church were baptized vicariously for those believers who had died but had not received the sacrament of baptism**.” (Emphasis mine) Kistemaker himself does not like this explanation and says so. But he later on admits that, “…many scholars suggest a literal interpretation as a vicarious baptism…”; to which he adds, “the objections are formidable.” They are formidable for Kistemaker because he is a Reformed Calvinist, and if he accepts the literal interpretation of this verse he would have to radically change his view of the role and nature of baptism, both for the living and dead. As to the other six explanations, Kistemaker concludes with, “In all humility I confess that the sense of this text escapes me; verse 29 remains a mystery.” (ZLMB thread, “Paul Taught Against Baptism for the Dead?”.)>>