KB Article # 8507
Issue: Why are confidence scores low for a page?
From a Document Assembly perspective, the lucene confidence score is weighted and lowered base on the algorithms defined here:
From a Lucene perspective, Lucene yields low scores if there is not enough content to learn and to compare against. This does not mean there is a problem as long as document assembly is occurring correctly. It is best not to think of confidence as a scale out of 100 but a number that must be compared to other values in lucene index relative to one another.
More info on Lucene scoring can be found here: http://www.lucenetutorial.com/advanced-topics/scoring.html