Low confidence is STILL an affirmative statement -im pretty sure the "low confidence" means because there is no access to source material (China)
Analytic confidence
https://en.wikipedia.org/wiki/Analytic_confidence
In an effort to apply more rigorous standards to National Intelligence Estimates, the National Intelligence Council includes explanations of the three levels of analytic confidence made in estimative statements.[1]
High confidence generally indicates judgments based on high-quality information, and/or the nature of the issue makes it possible to render a solid judgment. A “high confidence” judgment is not a fact or a certainty, however, and still carries a risk of being wrong.[1]
Moderate confidence generally means credibly sourced and plausible information, but not of sufficient quality or corroboration to warrant a higher level of confidence.[1]
Low confidence generally means questionable or implausible information was used, the information is too fragmented or poorly corroborated to make solid analytic inferences,
or significant concerns or problems with sources existed.[1]