I agree "no" is a bad idea. But I doubt "yes" has to do with intent at all. I think procedurally what the officer is doing is establishing a documentation reco

I agree "no" is a bad idea. But I doubt "yes" has to do with intent at all. I think procedurally what the officer is doing is establishing a documentation record to support their speed facts because that makes it easy for them if/when you contest the ticket in court. The officer has a preferred narrative/mold and is trying find a way to document that you agree with that version at the time you were pulled over in case you try to change the story later in court. So "yes, I know" seems to work essentially as that blanket acceptance of the officer's narrative.