Some addressees found the return to life after death, resurrection and reckoning inconceivable. Their objection arose in part from treating what lies beyond everyday human experience as though it were logically impossible.
Istib‘ad means regarding something as far-fetched. It is not the same as proving impossibility. Being unfamiliar with an event does not show that it falls outside divine power.
The response develops two connections: the revival of the earth after apparent death, and the relation between divine power and the possibility of bringing creation back.