Rhetorical argumentation and logical proof

قُلْ أَرَءَيْتَكُمْ إِنْ أَتَىٰكُمْ عَذَابُ ٱللَّهِ أَوْ أَتَتْكُمُ ٱلسَّاعَةُ أَغَيْرَ ٱللَّهِ تَدْعُونَ إِن كُنتُمْ صَـٰدِقِينَ

Say, "Have you considered: if there came to you the punishment of Allāh or there came to you the Hour - is it other than Allāh you would invoke, if you should be truthful?"