I was wondering about that too. Later there is "[...] Wikipedia users who tested the SIDE system were twice as likely to prefer neither of the references as the

I was wondering about that too. Later there is "[...] Wikipedia users who tested the SIDE system were twice as likely to prefer neither of the references as they were to prefer the AI-suggested ones". Not clear if this is the same as "did not have a preference". And if it's not, now we've got 110%