Update: The experiment, very similar to this – using Youngeness paradox to manipulate observed probabilities – is described in details by Vanchurin et al https://arxiv.org/pdf/1108.0665.
However, it is not clear if they actually performed the experiment and what are the results. His thought experiment used long delays – 60 minutes – and didn’t require the sameness of the observer’s state at the moment of observation. He also doesn’t assume that such probability manipulation can be used by evolution.
Probability manipulation via Youngness paradox doesn’t require MWI.
Update: The experiment, very similar to this – using Youngeness paradox to manipulate observed probabilities – is described in details by Vanchurin et al https://arxiv.org/pdf/1108.0665.
However, it is not clear if they actually performed the experiment and what are the results. His thought experiment used long delays – 60 minutes – and didn’t require the sameness of the observer’s state at the moment of observation. He also doesn’t assume that such probability manipulation can be used by evolution.
Probability manipulation via Youngness paradox doesn’t require MWI.