"We therefore hypothesized that AI’s throughput advantage allows it to pack conversations with more fact-checkable claims than human persuaders can, and that this is what drives its persuasive edge.

This “fact-density” account predicts that (i) constraining AI should selectively reduce persuadees’ perception of AI’s informational contribution to the conversation rather than non-informational features such as empathy or enjoyment, and (ii) fact density should predict persuasive impact across human and AI conditions alike."