a theory in crisis.

The Theory of Evolution.

See. It's just a theory!

Evolution: A Theory in Crisis.

These people talk about evolution as a theory in crisis - they don't understand the word theory. In layman's terms a theory is just a guess or something unproven, but in science a theory implies something that has been proven and generally accepted as true.

We stand on the precipice of a constitutional crisis, ... Bill Pryor is the last of the four most controversial nominees.