Most JWs are familiar with the Sadducees attempt at demonstrating the logical absurdities of a resurrection:
23That same day the Sadducees, who say there is no resurrection, came to him with a question. 24 "Teacher," they said, "Moses told us that if a man dies without having children, his brother must marry the widow and have children for him. 25 Now there were seven brothers among us. The first one married and died, and since he had no children, he left his wife to his brother. 26 The same thing happened to the second and third brother, right on down to the seventh. 27 Finally, the woman died. 28 Now then, at the resurrection, whose wife will she be of the seven, since all of them were married to her?"
29 Jesus replied, "You are in error because you do not know the Scriptures or the power of God. 30 At the resurrection people will neither marry nor be given in marriage; they will be like the angels in heaven. 31 But about the resurrection of the dead—have you not read what God said to you, 32 'I am the God of Abraham, the God of Isaac, and the God of Jacob' [a] ? He is not the God of the dead but of the living."
JWs point out that death ends a marriage, so the issue brought up by the Sadducees is moot - upon being resurrected, none of the 7 marriages is still valid.
But now wait a minute - what about children who die?
Extend the Sadducees example a bit. Suppose the woman had had one child with each of the 7 brothers, and each of those 7 children died in infancy.
Now we come to the JW "paradise earth" and the 7 brothers, 7 children, and the 1 woman are resurrected.
Wouldn't those 7 children deserve to be raised by their biological mother and father? How exactly would that work? If the marriages are all dissolved, how do the mother and each father work together to raise their child?
It seems the Sadducess just didn't ask the right question.
Just add one more absurdity to the growing list of such regarding the JW concept of "paradise earth".