most certain

"What we're most certain about is it is written in the hand of Chopin, paper that he wrote on himself in his own hand," he told BBC's Newshour.

Elena, 22, is one of the most certain people I’ve met: She is not having children.

“Based on the information currently provided … the most certain way to avoid health harms to this community and the children of Fairmount Elementary School and Pathfinder Kindergarten is for this project to operate elsewhere, not adjacent to a property with a school, child care center or other sensitive population,” the Department of Health official concluded.

It was the most certain "yes" I have ever said in my life.

"Paradoxically, today’s Fed meeting was one of the most certain and uncertain of the cycle. A 0.25% rate hike was fully priced in and widely expected by forecasters and investors. However, investors remain divided on whether this marks the last increase in the current tightening campaign."