Maybe prophetic questions reflect an uncertainty about the future in the debate initiator, or as with the example of feeling pain, a speculation that perhaps can't be answered, but the debate initiator feels or thinks it's an important consideration.
Educated guessing is a part of debate, especially when we argue policies. What will happen if such and so happens? Well, sometimes it's just strident ideology yammering, but that goes on regularly. Other times it is thoughtful analysis of cause/effect relationships.
Lower taxes and what will happen? Raise debt and what will happen? Privatize a current government program, and you get . . .
Local elections will be taking place around here in November. The air is thick with speculations on a few key issues, and as always, people have their own ideas on how things will work out.
Mine happen to be accurate