based on theory

But to estimate how much rotational energy it had at each step, Myers and Fink relied on inferences based on theory, introducing some uncertainty.

That stance was more understandable last August, when safety guidelines for schools were primarily based on theory.

"My deradicalisation work is not based on theory. It's from life experience. I was a fighter and a terrorist, so I come into the cells as a friend."

Though the procedure was common at the time for a variety of ailments, its benefits were based on theory, not rigorous evidence.

Although the two men worked independently, the academy recognized them together for work that “broadened the scope of economic analysis” through modeling methods — a means of forecasting economic processes based on theory and data — that are used to study long-term change and shape policy practices.