"It is appointed unto man once to die and after that the judgement."First off they are talking about physical death.
When the White Throne judgement occurs, lost souls die a second
time. They will exist in physical bodies able to suffer fire torment in the Lake of Fire and Brimstone. Their souls and spiritual bodies shall likewise perish. This is part of the second resurrection of the dammed which shall place after the tribulation.
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another fine piece finely set