Hypothetical scenario 1: Let's suppose Person A exists for a while and has belief set A. Now person B comes along a while later and /claims/ to be a life-extens

Hypothetical scenario 1: Let's suppose Person A exists for a while and has belief set A. Now person B comes along a while later and /claims/ to be a life-extension clone or something of Person A who is maybe entitled to some of the resources that Person A had available. (Maybe just a different avatar, in video game terms) Should Person B. exhibit some or all of the same beliefs that Person A had in order to claim this? (I would say obviously yes..?) Hypothetical scenario 2: Suppose that Person A has whatever beliefs in ordinary times, but is put in a stress or otherwise abnormal situation and forced to make whatever decision. Should their decision be their ordinary time logical choice, or their choice under a high amount of stress? I'm sure I could come up with more scenarios, but the point is, what should be intellectually considered a given person, in circumstances like a simulation where an adversary could heavily muddle the waters.