This conclusion follows from comprehensive and consistent evidence and from the proven principles of the various natural sciences.

"There is much more of an interest in proven principles than the thinking you had a couple years ago."

"A proven principle of transportation was discarded, and we suffer from it today," he said.

TRAC adheres to the proven principles of scientific inquiry and applies the problem solving model to perform its analysis.

This practice should be based on proven principles, acceptable to all, and not on routine and ritual.

This is a proven principle.

The party hopes to "apply proven Judeo-Christian principles of justice and compassion to Canada's contemporary public policy needs".

They also apply proven principles to known situations and evaluate unexpected or contradictory results.

Let us not lose sight of the proven principle of a circular economy.

He's investing with solid, proven principles.