| Clue | Source | Date |
|---|---|---|
| Not as warm | LA Times Daily | 27 Jun 2025 |
| Rockier | ||
| More stubborn | Newsday | 14 Jul 2024 |
| Less empathetic | Wall Street Journal | 08 Jun 2023 |
| More straight-faced | New York Times | 08 Aug 2021 |
| Less expressive | New York Times | 19 Jul 2020 |
| More impassive | Thomas Joseph | 29 Jul 2019 |
| Less expressive | Wall Street Journal | 02 Jan 2019 |
| Less expressive | ||
| More poker-faced | Newsday | 10 Jul 2016 |
| More pebble-strewn | Thomas Joseph | 24 Aug 2015 |
| Harder to till, in a way | USA Today | 02 Jun 2015 |
| Harder to till, in a way | ||
| Less likely to gush | ||
| More poker-faced | ||
| Less emotional | ||
| Less expressive | ||
| Less sympathetic | ||
| Less sympathetic | ||
| More obdurate | ||
| Less emotional | ||
| More unfeeling | ||
| Not as warm | ||
| Less expressive | ||
| More unfeeling | ||
| More pitiless | ||
| More unyielding | ||
| More hard-hearted | ||
| Harder. | ||
| More unfeeling. | ||
| More flinty. | ||
| Less forgiving | ||
| More hardhearted. |