"Absolute assurance" means having complete and unquestionable certainty or confidence about something. It suggests that there is absolutely no doubt or uncertainty. Full definition
Buy organic matcha and that benefit is enhanced with absolute assurance of safety in your cup each and every time. (healthytokyo.com)
This gives puppy buyers absolute assurance about the credentials of the breeders on the scheme and the strength of our inspection process. (marcthevet.com)
The agency's conclusion: «Although the test results can not be used to provide absolute assurance, we believe that these test results, combined with the other reviews that have been conducted by Florida, GAO, and others, have significantly reduced the possibility that the iVotronic DREs were the cause of the undervote.» (scientificamerican.com)