Pretty sure means don’t know.

I grew up on pew data; I was disappointed years ago when they stopped using face to face interviews.

Later, I could not get a good answer about how they dealt with the scam epidemic the last few years

I’m beginning to think most polling companies in the USA have serious flaws in their methodology because of changes in the last few years, and they’re not going back to in person questions.

But these are institutions now in the USA, so most people assume they know what they are doing.