Making the inference to the supernatural

The apologist needs to show that if Jesus rose from the dead, he probably rose supernaturally (i.e. there was divine involvement). But how can he do this? He can only do this by showing that Jesus probably couldn't have risen naturally. In other words,

P1. Jesus probably couldn't have risen naturally. [I'm granting - for purposes of argument - that Jesus really did rise from the dead].
C. Therefore, Jesus probably rose supernaturally.

When we ask the apologist how he will attempt to establish (1), his defense will be to appeal to current science and our knowledge about the possibility of people coming back from the dead. In other words,

P1. The rest of humanity can't rise naturally.
C1. Therefore, Jesus probably couldn't have risen naturally.
C2. Therefore, Jesus probably rose supernaturally.

This route seems more promising, and if we grant (P1), as most do, then only one question remains: Is the inference from (P1) to (C1) valid? It would be if the apologist can demonstrate the following:

Assumption ~A: there probably could not have existed relevant differences (i.e. physiological, technological, etc) between Jesus and the rest of humanity which could explain why Jesus, but not the rest of humanity, might have been able to rise naturally from the dead.

Why is (~A) needed in order for the inference from (P1) to (C1) to be valid? To see that (~A) is needed, consider:

Assumption A: there probably could have existed relevant differences (i.e. physiological, technological, etc) between Jesus and the rest of humanity which could explain why Jesus, but not the rest of humanity, might have been able to rise naturally from the dead.

If (A) were true, then clearly the inference from (P1) to (C1) would fail, and if there were no good reason to believe that (~A) were true, the inference would also fail. Hence the apologist is forced to argue that (~A) is true, which I do not think he can do. Thus we finally come to:

P1. The rest of humanity can't rise naturally, and ~A.
C1. Therefore, Jesus probably couldn't have risen naturally.
C2. Therefore, Jesus probably rose supernaturally.

Now we see the problem: there's no good reason to accept (P1) because there's no good reason to believe (~A).