I think they didn't express it very clearly. Seems like they mean "short-circuiting" your reasoning when cognitive dissonance is present.

For example, maybe you have a couple of incompatible thoughts::

"I want to do X. That seems like a great idea!" "X is very risky and probably not healthy for me."

...which creates mental conflict, so you just turn off your brain with a "YOLO" or "What happens, happens" and act on the most immediate impulse.