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"that we as catalogers can only do so much with the information we have and the background knowledge we have. The problem here – is a wiki is open to the public or at least to all in a specific field and with bib records we save them to our system and maybe send them to a cooperative of some sort – but then that’s our record, we don’t get to benefit from the others that edit the record after us because it’s in their system – not accessible to us. "
All three posts are worth a read.