| 1 | The dollar should be backed by gold and silver, so we have hard money. | |
| 2 | Neighbours wonder whether claims will one day be backed with force. | |
| 3 | He has emphasized the need for diplomacy but has been prepared at times to back it with the threat of force. | |
| 4 | He also refuses to be impressed by a philosophic vogue or a fashionable theory, even though it were backed by the greatest name. | |
| 5 | You would assume that such strong claims were backed by solid proof, but the evidence is, in fact, mixed. |