The error is confusing destruction with ceasing to exist. If I destroy my car in a road smash, it will still exist.
There is no biblical basis for the view that unsaved souls are destroyed, also known as annihilation-ism.
Many use verses which in context are talking about physical death, then apply these to spiritual death. Revelation gives a good ...
Credit to user Mark Edward from whom this text is taken, from the end of a long answer to a different question
I’m pasting it because it is the only text we found on the se addressing what Annihilationists use as basis. If you dislike it, you can try to provide a better answer.
Where conditionalism defines human immortality as conditional ...