Definition of "incontrovertible"

There is incontrovertible evidence that electrification of itself has great publicity value, but this would be greatly enhanced if the public knew in more detail how it would transform their services.

1960 November, “Talking of Trains: Through a glass darkly”, in Trains Illustrated, page 642

All said that the incontrovertible evidence that climate change has already arrived—in the form of frighteningly extreme wildfires, drought, storms and floods afflicting every corner of the United States—has helped build political support.

2022 August 7, Coral Davenport, Lisa Friedman, “Five Decades in the Making: Why It Took Congress So Long to Act on Climate”, in The New York Times‎