Well,
What triggers this case, in particular, is that you see Crystal at the nightclub and you can help her before at the fair, but the condition to help her prevents you from entering the nightclub later.
I've been working for the last two months to do a dependency tree of all the memories + fun points. Something that I should have done at the beginning and not 966 memories + fun points in.
This is the first draft...
View attachment 1393417
Madness
Anyway, the first draft is done and now all hints will point towards what you can do to advance base on what you already did (instead of a predefined order or all available hints of everything)
I'm sure that I would have to fiddle with this some more but this is going in the right direction and serves as a foundation for something else...
Cheers!