Github user karlhigley commented on the issue: https://github.com/apache/spark/pull/15148 @sethah: Your description of the combination of AND and OR amplification from the literature matches my understanding, and the combination of the two is what I was aiming for in spark-neighbors. I also concur with your assessment of the potential performance impacts of OR-amplification without first applying AND-amplification, in terms of both precision/recall and runtime.
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