| Clue | Source | Date |
|---|---|---|
| Self-destruct button on the bottom of a robot's foot, e.g. | ||
| Leaky lid on a water bottle, for example | ||
| Problem that may be confused with operator error | LA Times Daily | 07 Sep 2024 |
| Cause of a product recall, perhaps | LA Times Daily | 30 Oct 2022 |
| Cause of a product recall, perhaps | ||
| Blueprint misprint, e.g. | ||
| Inventor's setback |