| Clue | Source | Date |
|---|---|---|
| Intellectual ability, important issue for older people? | The Times Cryptic | 04 May 2023 |
| Intelligence is a boring topic | The Times Cryptic | 15 Apr 2022 |
| Anatomist speaking on less shiny part of head | ||
| Sign of maturity? Comparatively less lustrous nous | ||
| Brains you need for such an ill-defined issue? | ||
| Intelligence is a boring topic |