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From: rgr on 9 May 2010 08:44
Depends on if the observers know their accuracy. In real life, that
should be the case. If the observers provide a bound for their result,
you end up with an intersection of possible positions. Sorry, I do not
have a reference for this. But it is a problem if interval
mathematics. If the observers return a distribution for their
observation, you end with a statistical problem. I do not have a
reference for that too.

If the observers know nothing about the accuracy, the best you can do
is to examine all possible combinations of observations, which yield a
valid result, and draw a conclusion from all the points you get this
way. E.g., you could take the mean value.
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