this is nothing but a question from this foolish person
if christ indeed preaches in the spirit prison
then there is still a chance for the dead to be save even though they know nothing of what is happening in the living world nor can they feel a thing nor can they do a thing
so we can still save our dead beloved ones if we prayed?
Most people I find pray for their friends and family that have died. That God will accept them into his presence.
It's important to know that God preaches to those in man made prisons, they also know nothing that is going on in the world and require re-rehabilitation to re-enter the world with other people, since they're often violent or corrupt. And I can't say, but here are the two scriptures that talk about visitations to prison and perhaps other scriptures refer to this:
1 Peter 3:19
King James Version
19 By which also he went and preached unto the spirits in prison;
Matthew 25:36
King James Version
36 Naked, and ye clothed me: I was sick, and ye visited me: I was in prison, and ye came unto me.
Some would disagree. But the scriptures which say and the scriptures which hint about spirit prison throw doubt that there isn't one. It has been brought to my attention that Christ preaching to the spirits in prison might relate to Noah's time considering the scriptures just after 1 Peter 3:19.