| Clue | Source | Date |
|---|---|---|
| What "2 + 2 = 4" is an example of | LA Times Daily | 27 Feb 2018 |
| What '2 + 2 = 4' is an example of | The Washington Post | 27 Feb 2018 |
| What "2 + 2 = 4" is an example of | ||
| Basic two-element computation | LA Times Daily | 20 Sep 2017 |
| Basic two-element computation | The Washington Post | 20 Sep 2017 |
| Basic two-element computation |