[wideawake]

You are aware of these, aren’t you?

Of course, but this list is not official: it's a traditional mnemonic.

[FourtySeven]

I think it’s fair to say that Salvation’s list is partial, but not complete.

That is, she is right that her list is a list of “official sins”.

But you are right to say that there exists no *complete* list of official sins.

This is because our definition of sin is not merely an objective definition (although there are objectively evil acts), but also involves a subjective component, our “free consent” and “knowledge thereof” (the last two make an objectively evil act done a mortal sin). Thus, there’s no way to list all mortal sins (and thus, by extension, all venial sins), since for each person, there exists a different “list’, based on their knowledge and free consent.