It depends what you mean by possible. SIA is about all possible multiverses I might be in. If you assign a probability to whether or not the multiverse allows X to exist, SIA will say you should consider yourself randomly drawn from all possible observer instances across both possible multiverses.
It depends what you mean by possible. SIA is about all possible multiverses I might be in. If you assign a probability to whether or not the multiverse allows X to exist, SIA will say you should consider yourself randomly drawn from all possible observer instances across both possible multiverses.