Apostle Peter says in his epistle that the new birth occurs from an incorruptible
seed, which is the Word of God. (...born again not of corruptible
seed, but of incorruptible, by the word of God. 1 Peter 1:22)
Lord Jesus strengthens this view when He says that the
seed from the parable of the sower is the Word of God. (The
seed is the Word of God. Luke 8:11)
What we can note is that for the one that is born again, God's
seed/Word abides in him. (Whosoever is born of God...his
seed remains in him. 1 John 3:9)
Hence it is possible to distinguish if someone is born again by verifying if they have received the full, unaltered
seed of God.
If we receive a modified seed, we will not be born of God but of the one who modified the seed we received.
Take for example the teaching of Lord Jesus on non-resistance and loving your enemies.
Lord Jesus teaches: But I say unto you, That ye resist not evil: but whosoever shall smite thee on thy right cheek, turn to him the other also. Matthew 5:39
So for example if someone is enrolled in the army or works in law enforcement, and declares himself "born again", we can note that the seed he has been "born again" of does not have the teaching of Lord Jesus regarding non-resistance and loving your enemies. So his birth is a counterfeit birth.