> A really clever site would ask you for your point of view (or 
> remember when
> you disagree) and adjust accordingly. A complex task though... 

A feedback neural network should be able to solve it reasonably
straight-forwardly (although you would need a large sample of data with
which to train the network on a per-user basis, which could also give
large overheads) - its effectively spam-assassin for news, but slightly
different.


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