Harry felt sure that such circumstance could not exist.

A few circumstances exist where the 'but for test' is ineffective.

However, the necessary circumstances existed in 1944, 1982 and 1994.

Do either or these limiting circumstances exist in this instance?

"Whether or not those circumstances exist in this case is now left up to the trial judge."

However, disease occurs only when circumstances exist that weaken and stress the fish.

Very well; what would be said, now that circumstances exist as they do?

"The only circumstance that could finish them off does not exist for now," he said.

If exceptional circumstances exist, the agency still must respond to that effect within 20 working days.

The circumstances in which it was dreamed up no longer exist.