I think 1&#x2F;2 argument makes essential use of the fact that the &quot;2 people&quot; are the same person at different times.  Ultimately it comes down to a different idea of the way &quot;being right twice&quot; is valued.  In the 1&#x2F;3 position, the model is that each time you answer the question you get something good if you&#x27;re right.  In the 1&#x2F;2 perspective, the idea is that after the whole experiment is over you either were simply correct or incorrect, and being correct twice doesn&#x27;t count any extra.