[bdsa]

Probably because they find it uncomfortable to be pressed and the net result is a less productive relationship.

[samiv]

Exactly this. You just put them on the spot and they lose face and you're embarrassing them. Besides this interaction has already made it know they they don't know the answer so what's the benefit of forcing them to announce they they don't know something?

[egorfine]

Understood.

But is it productive to cooperate with someone who will never admit lack of information?

[haspok]

Because the tail should not be wagging the dog.

If they cannot take a step towards another culture, why should I?