I DON'T know EXACTLY what you meant. That is why I am asking. You're changing the subject.
Do you believe in the principle that if a group tasked with predicting something is inaccurate, that they can't be believed in a new prediction? Seems a pretty simple question.

But it started me thinking about it even more. Obamacare was over 8 years ago. Is this the same CBO that made that prediction? Could they have noted their errors and made adjustments? Just how similar is Obamacare to the new proposal? Wouldn't is make sense that the more similar it is the more likely they will repeat their mistake? Or, maybe not. 

You asked: "How accurate was the CBO in scoring the ACA?" The current effort is to dismiss the CBO so as to render the latest proposal immune to their analysis.  They are predicting 24 million will lose their insurance. If the CBO was half right, that still means 12 million lose insurance.

Maybe there is just more to the claim that the CBO is flawed due to past performance.