I would interpret {qarbe’’a’} as asking me to confirm that a statement is inaccurate. Since we are asking if the information is {qarbe’}.

vagh vIghro’ ghaj qurgh, qar’a’?

“qurgh has 5 cats, is that correct?”

loS vIghro ghaj qurgh,qarbe’’a’?

“qurgh has four cats, is that incorrect?”

Except qar'a' is a recognized feature of the language, while qarbe''a' is not. I don't think Klingons who hear qar'a' are thinking that it means is it correct? It would come across to them more like amiright? It's a thing you say, not a sentence to be parsed.

-- 
SuStel
http://trimboli.name