| Clue | Source | Date |
|---|---|---|
| Truth detector (3,4) | ||
| Polygraph's purpose | Newsday | 06 Dec 2023 |
| Polygraph's purpose | Universal | 29 Apr 2016 |
| Polygraph's purpose | ||
| Polygraph | ||
| Criminal's undoer, informally | ||
| Criminal's undoer, informally | ||
| Polygraph exam, informally | ||
| Polygraph function. | ||
| Polygraph's purpose |