All right, you see, this is something they would both agree on, some kind of opinion they had in common, and they both expressed it in their words at some point. Each of them at least once. But they both did not necessarily express it just by words - only I think the words are most apparent.
Hmm, I had some better hint in mind last time when you asked, but unfortunately, I forgot it, apparently
But if you ask for more hints, hopefully I can come up with something better. This is just for now.