| 1 | Cancer is a kind of persistent ailment. | |
| 2 | Two of the Tories' obstinacies look especially worrying. | |
| 3 | The economic ills we suffer have come upon us over several decades. | |
| 4 | Extraction of confession by torture has been one of the persistent ailments in legal affairs. | |
| 5 | Torture is difficult to cure the chronic problem of law enforcement. |