The following is a valid modus ponens argument. The law of modus ponens is simply this:
If p, then q.
Applying to a major aspect of postmillennialism, we can make a valid postmillennial modus ponens argument.
Let J= Jesus asked the Father for the nations.
Let F= the Father will give Christ the nations.
Here is the argument:
If J, then F.
"Ask of Me, and I will make the nations Your inheritance,
the ends of the earth Your possession." --Psalm 2:8