Definition of "unreviewable"

As we emerge from eight years of extravagant executive claims of unreviewable authority, Congress should be especially scrupulous about having a solid legal basis for controversial actions.

2009 January 7, Walter Dellinger, “City of Cold Shoulders”, in New York Times‎

And then there are the catch-all provisions: rules that allow police to stop drivers for conduct that complies with all the rules on the books, but that officers consider "imprudent" or "unreasonable" under the circumstances, or that describe the offense in language so broad as to make a vioation virtually coextensive with the officer's unreviewable personal judgment.

2019, Malcolm Gladwell, Talking to Strangers