لِأَنَّهَا أُمُورٌ مُمْكِنَةٌ، أَخْبَرَ بِهَا الصَّادِقُ
They are possible matters reported by a truthful messenger.
The argument joins two premises: rational possibility — questioning, punishment, and bliss do not entail a logical contradiction; and reliable revelation — evidence exists in transmitted teaching that affirms them.
Not knowing an experience's ordinary worldly mechanism does not prove it impossible. Impossibility requires a genuine contradiction; an unfamiliar or unseen state is not ruled out merely because it falls outside customary experience.