| Clue | Source | Date |
|---|---|---|
| Obscure or secret info | ||
| Arcane matters | New York Times | 13 Mar 2022 |
| Boozer covered with weird secret principles rarely seen | ||
| Arcane stuff | LA Times Daily | 20 May 2018 |
| Arcane stuff | The Washington Post | 20 May 2018 |
| Arcane stuff | ||
| Arcane matters | New York Times | 30 Sep 2016 |
| Arcane matters | ||
| Obscure knowledge | Wall Street Journal | 10 Jul 2015 |
| Abstruse stuff | LA Times Daily | 26 Feb 2015 |
| Obscure knowledge | ||
| Abstruse stuff | ||
| Abstruse stuff | ||
| Arcane stuff | ||
| Obscure things | ||
| Abstruse stuff | ||
| Arcane stuff | ||
| Gnostic knowledge, e.g. | ||
| Gnostic knowledge, e.g. | ||
| The arcane and the abstruse | ||
| Obscure stuff | ||
| Obscure stuff | ||
| Obscure stuff | ||
| Recondite state | ||
| Secret doctrine. | ||
| Abstruse doctrines. | ||
| Indie rock knowledge, e.g. |