The claim
In multi-document and conversational contexts, documents that contribute genuinely new information can be ranked more favourably than those that merely repeat existing content.
What the evidence shows
The information gain patent describes computing an information gain score for a document relative to content the user has already been shown, favouring results that add incremental value. This is especially relevant to research journeys and AI/assistant contexts, where restating consensus is penalised relative to contributing original data, analysis or perspective.