11.   If there is no uncertainty, the fair price of a financial futures contract can be determined very simply using the cost-of-carry model.

12.   Uncertainty is a feature of many aspects of risk management.

13.   This uncertainty is prone to be interpreted as woolliness by parents who prefer to trade in certitude.

14.   Gibble and Chu are not distressed by the discrepancy, because there is fair uncertainty in the interatomic potentials that are used in the calculation.

15.   Further work began to suggest that palaeomagnetic data supported the model of continental drift proposed by Wegener although there were initial uncertainties over the accuracy of the technique.

16.   Secondly, there is uncertainty about what can be kept electronically, and what should be kept.

17.   Second, there was some uncertainty as to the law.

18.   And there is an uncertainty about how and when any interaction will take place.

19.   There is uncertainty as to whether the exchange of trading stamps for goods is a sale or an exchange.

20.   There was huge uncertainty surrounding the proposed changes on milk quotas.