[annalex]

The author names Polycarp and others but why not the other apostles who heard Jesus’ words at the same time John did?

Indeed, if there had been a single father of the Church not otherwise known as complete heretic, who believed that the water in John 3:5 is really womb, or if there were other scripture that said that water means womb, Sungenis's argument would disappear and the interpretation of John 3:5 as a reference to the necessity of baptism would have been speculative and not dogmatic. However, the water-means-womb interpretation is not supported by anyone till 15c at the earliest.

Incidentally, 1 Peter 3:21 "whereunto baptism being of the like form, now saveth you also" doesn't help the radio reverend's case either, although I am sure he got some spin to explain that away as well.

[count-your-change]

My comment was directed to the idea that the writer was citing Polycarp, et al, for explanations of John's words when the apostles were available and had the authority of appointment from Christ Himself.
Which one would understand John's teaching and knowlege better?
His attempts to reason out an interpretation of Jesus’ words to the Saducees are even worse.
As to the radio program, I can't address it as I didn't hear it.