| Clue | Source | Date |
|---|---|---|
| Incontrovertible principle | ||
| Incontrovertible ruling principle | The Washington Post Sunday | 04 Aug 2019 |
| Rule with no exceptions | Thomas Joseph | 15 Oct 2018 |
| Absolutist's rule | New York Times | 19 Dec 2017 |
| Absolutist's rule | ||
| Indisputable doctrine | Wall Street Journal | 05 Nov 2016 |
| Rule with no exceptions | ||
| Rule without exceptions |