For one thing, uncertainties about the safety of a chemical for humans will persist even after toxicity testing in animals is successfully completed.

If the uncertainty in the markets persists, some Japanese executives say, they will trim their investment plans.

There is now a consensus that the paintings are post-palaeolithic, although uncertainty persists as to their date.

The trouble is that this uncertainty could persist for some time.

Because no clearly identifiable corpse was known to have been found, uncertainty about Hitler's fate persisted for years.

There are others with different results, and uncertainty will persist.

A declaration of cold war imposed a certain clarity and sense of mission, yet uncertainties persisted.

As regards people, uncertainty persists over some basic principles, notably in the transferability of social rights.

As I said before, when scientific uncertainty persists it is up to the politicians to make a decision.

This means the uncertainty will persist, with the result that potential customers will not know what their tariff will be.