The number of observers in the possible worlds given their observations are 8 for A and 1 for B (with weighting 1⁄2 each) before 1 minute passes. So SIA says that the odds are 8:1 in favour of A at that time. The weighted number of observers who survive more than a minute is 1⁄2 for A and 1⁄16 for B, so the odds remain unchanged at 8:1 in favour of A.
Under SSA there are equal odds of scenarios A and B, which don’t change in the first minute since they are observationally indistinguishable. After a minute, scenario B(i) in which the clone lives and scenario A are still indistinguishable, with weightings 1⁄2 and 1⁄16 respectively. B(ii) is ruled out, so the updated odds are 8:1 in favour of A.
This analysis is unchanged if you replace “is killed” by “is told which scenario they’re in” and condition on a minute passing and not being told which scenario you were in.
The number of observers in the possible worlds given their observations are 8 for A and 1 for B (with weighting 1⁄2 each) before 1 minute passes. So SIA says that the odds are 8:1 in favour of A at that time. The weighted number of observers who survive more than a minute is 1⁄2 for A and 1⁄16 for B, so the odds remain unchanged at 8:1 in favour of A.
Under SSA there are equal odds of scenarios A and B, which don’t change in the first minute since they are observationally indistinguishable. After a minute, scenario B(i) in which the clone lives and scenario A are still indistinguishable, with weightings 1⁄2 and 1⁄16 respectively. B(ii) is ruled out, so the updated odds are 8:1 in favour of A.
This analysis is unchanged if you replace “is killed” by “is told which scenario they’re in” and condition on a minute passing and not being told which scenario you were in.