Evidence from slaves is rarely viable in a court of law.

The seeds can remain viable in the soil for up to 4 years.

Power of your kind isn't going to be viable in the modern world.

Most of them would not be viable in any case.

His view is supported by others, who see the strategy as still viable in the 21st century.

Enrollment had fallen to 150, and to be viable in the long term, the school needed at least 250 students, he said.

"We are faced with a city that is not viable in the long term under its current structure."

They were not considered to be viable in the time frame allowed.

The new construction became economically viable in April 1571 and works began immediately.

We believe that this approach is viable in terms of efficiency and cost.