One of the key questions surrounding Obamacare is just how many people have been newly insured under the law. The answer is clouded by the fact that the White House and others have changed some rules of math for making these assessments.

For example, several years ago, the Obama administration fiddled with the Census Bureau’s definition of what it means to be “uninsured.” The new parameters, which were looser than the old factors, make it hard to construct comparisons between today’s figures for the total number of uninsured and the historical trends.

The Obama team also abruptly started to exclude uninsured illegal immigrants from the national tally on total number of uninsured Americans. Before Obamacare, these individuals were counted in that reporting, inflating the numbers. After Obamacare, these individuals didn’t get insurance, but suddenly didn’t get counted any more.

Now, a new analysis from the highly regarded managed care analyst at Goldman Sachs, Matthew Borsch, and his team, cast uncertainty on some of the recent data releases from the White House, and its network of academicians. In particular, the Goldman breakdown conflicts in some key ways with a recent analysis from RAND that was published in the journal Health Affairs and widely cited by the media.