Hello, I'm thinking of starting a UA 3rd edition campaign soon, and I'm rereading Book One: Play and have some questions about mundane Identities with regards to when you can/cannot roll them.
Obviously Identities substitute for an ability, and can be rolled in that abilities place. My first question is whether you can also sub in the identity if the ability that the identity replaces isn't relevant, but fictionally you can justify using the skills the identity taught you. For example, maybe my Identity is Lifeguard, which substitutes for Fitness. During the game my character is trying to perform CPR on someone in the middle of a fight, which is probably a Knowledge roll. Can I substitute my Lifeguard ability because being a Lifeguard likely taught me CPR?
A related question to this regards the "Of Course I Can..." features. My original assumption was that this just flavours the Identity and tells us something about it, is this correct or do they also have mechanical implications? Lifeguard is an example Identity in Book One: Run, and has 'Perform CPR' as one of its "Of course I cans". So does this mean that if I found myself in the above situation, I could do CPR without a roll even in a fight? Or could I sub in the Lifeguard ability, or would I be forced to use the relevant standard Ability (probably Knowledge) because Lifeguard doesn't substitute for Knowledge?
This also concerns the Unique feature for Identities. Are Unique features always rolled, sometimes rolled, or never rolled? How do Unique features differ from Of Course I Cans?
Finally, I have a question about Casts Rituals. This is obviously an Identity feature, and the book states that if you don't have Casts Rituals as an Identity feature, Secrecy is rolled instead. Should I therefore take this to mean that an Identity that Substitutes for Secrecy cannot be used to cast Rituals? I can't find anywhere in the book that this is outright stated, but it would make Casts Rituals always worse than Substitutes for Secrecy.
I'm very sorry about the long post, and doubly so if this is clearly answered in the books somewhere.