Argument by A. Plantinga.
Plantinga then says that it is possible in all these weakly actualized worlds that a particular being goes wrong in respect to some action. It is also possible given all the counterfactuals that God knows, to have a person, which no matter what situation they are placed in, will go wrong at some point. If this one being goes wrong at least once in every weakly actualized world, then it was not in God’s power to have this being only perform moral good. If it is the case that this creature goes wrong at least once in every weakly actualized world, then that creature suffers from transworld depravity.
Transworld depravity can be defined as:
“An Essence E suffers from transworld depravity if and only if for every world W such that E entails the properties significantly free in W and always does what is right in W, there is a state of affairs T and an action A such that
- T is the largest state of affairs God strongly actualizes in W,
- A is morally significant for E’s instantiation in W, and
- If God had strongly actualized T, E’s instantiation would have gone wrong with respect to A.”