[Aquinasfan]

Though after death is also a possibility. The premises do not entail that this choice is offered before death. Correct?

No. The choice would be before death. The infants would have to have been given infused knowledge of some kind.

The Fathers were in Limbo because, in part, they were not yet able to choose Christ.

True, but they were able in their lifetimes to choose for or against what truth they knew. They were bound for heaven (or heaven through purgatory) but were in limbo because the gates of heaven were not yet opened.

Babies are not yet able to choose.

True. The ability to make a reasonable choice would have to be infused.

We also know that positive development occurs after death (e.g. purgatory).

Purification and sanctification. But the fundamental choice for God has already been made.

[adiaireton8]

I appreciate your reply, and agree with you for the most part, but this seems too Cartesian to me. I would think that natural physical development would be necessary in order to choose, even if this development were to take place in an expedited fashion after the resurrection.

-A8