I have proposed this challenge multiple times to those who claim that the rejection of BoD for catechumens is heresy.
Demonstrate --
1) how BoD was unanimously taught by the Church Fathers (which would indicate that it was revealed)
Even if there was one or two Fathers that believed in BOD it would not make it "unanimously taught ", nevertheless, there was not one Father that believed it.
On the other hand John 3:5 was literally understood by the Fathers of the Church unanimously, it is a revelation.
Jesus answered: Amen, amen I say to thee, unless a man be born again of water and the Holy Ghost, he cannot enter into the kingdom of God. (John 3:5)
Fr. William Jurgens: “If there were not
a constant tradition in the Fathers that the Gospel message of ‘Unless a man be born again of water and the Holy Ghost he cannot enter into the kingdom of God’
is to be taken absolutely, it would be easy to say that Our Savior simply did not see fit to mention the obvious exceptions of invincible ignorance and physical impossibility.
But the tradition in fact is there; and it is likely enough to be found so constant as to constitute revelation.”