  Kelly (2005) argues that while 3 is evidence for 2 it is not evidence for 1. If 3 is not evidence for 1, then in learning 3 (by discovering the peer disagreement) one does not gain any evidence relevant to the disputed proposition. If learning of the peer disagreement doesn’t affect one’s evidence relevant to the disputed proposition, then such a discovery makes no change for which doxastic attitude is justified for the peers to take toward the target proposition. On this view, the discovery of peer disagreement makes no difference for what you should believe about the disputed proposition.