That's... not absolute evidence, but it's evidence.  He wishes it hadn't been obtained at that kind of cost.  "I have another third-circle divination which looked a lot like that one, though not identical.  You -"

"- I can't say it's not important but Civilization would correctly kick me out if I pressured you into this."

That's... not absolute evidence, but it's evidence, if they don't have easy ways to fake that too.  He wishes it hadn't been obtained at that kind of cost.  "I have another third-circle divination which looked a lot like that one, though not identical.  You -"

"- I can't say it's not important but Civilization would correctly kick me out if I pressured you into this."