I don't see any mention of it, or any concept here.
Scripture says that when Rachael's soul was in the process of departing she died.
And it came to pass, as her soul was in departing, (for she died) that she called his name Benoni: but his father called him Benjamin. - Gen 35: 18
Every man woman and child who ever lived will be conscious for eternity.... somewhere.
Jesus told Nicodemas THREE TIMES that you have to be born again to go to a pleasant place where God's Kingdom Rules after you die. But the WT tells its members not to get born again.
So, whom we believe will dertermine where we spend eternity. Jesus repeatedly urges people to believe him instead of others. (See Revelation 6:9-11 & 1 Samuel 28: 7-20)
Especially after he predicted that he would raise himself from the dead, while he was dead.... and then did it; huge numbers of people kinda did the math and decided that even though their Jewish relatives would reject them forever, they would believe him anyway. It is difficult (but not impossible) to not believe a man who said that he woudl resurrect himself from the dead, and then did it.
John 6:47
Truly, truly, I say to you, he who believes has eternal life.
John 6:29
Jesus answered and said to them, “This is the work of God, that you believe in Him whom He has sent.”
John 6:69
We have believed and have come to know that You are the Holy One of God.”
John 6:64
But there are some of you who do not believe.” For Jesus knew from the beginning who they were who did not believe, and who it was that would betray Him.
John 6:44
No one can come to Me unless the Father who sent Me draws him; and I will raise him up on the last day.
John 6:35
Jesus said to them, “I am the bread of life; he who comes to Me will not hunger, and he who believes in Me will never thirst.
Acts 16:31
They said, “Believe in the Lord Jesus, and you will be saved, you and your household.”
John 20:31
but these have been written so that you may believe that Jesus is the Christ, the Son of God; and that believing you may have life in His name.
Romans 10:10
for with the heart a person believes, resulting in righteousness, and with the mouth he confesses, resulting in salvation.
John 9:22
His parents said this because they were afraid of the Jews; for the Jews had already agreed that if anyone confessed Him to be Christ, he was to be put out of the synagogue.
JW's will put anyone out of their church if they talk too much about Jesus and especially if they encourage others to accept the new covenant "for the forgiveness of sins". (Mt., 26: 27-28)
The Wt is a giant Satanic deception and should easily be recognized as such just from the false predictions alone.
The fact that they tell people to do the opposite of what Jesus said to do is overwhelming evidence that JW's are nothing more than anti-christs.