Why do the Chelish allow their version of Governance to keep secrets just because they're embarrassing - no, he shouldn't ask that right now.
Darn it, he should've asked her if the government was keeping any secrets, first, without the qualifiers. To see if she would've danced around that one, or maybe implausibly answered 'No', and then Keltham would've had a high probability on the test results being faked in that branch of reality -
Keltham really wishes he'd LARPed this at least once before trying to do it in real life.
"To your best knowledge and best guess, if somebody signs an agreement with me about credit for information given, future equity shares in industrialization projects, or similar matters, what's the probability they go back on their word as given by the person purported to me to represent the Chelish government? Excluding scenarios where I would obviously agree in retrospect that the agreement should be broken as a matter of drastic urgency because otherwise Rovagug gets loose or whatever."