Sentence examples for an intractable problem from inspiring English sources

Corruption remained an intractable problem.

It's not an intractable problem.

It is an intractable problem indeed.

Peripheral nationalism constituted an intractable problem.

It need not be an intractable problem.

I don't see an intractable problem with customers.

Critics say the antimissile program is ignoring an intractable problem.

"This is not an intractable problem to be solved.

Factoring is what mathematicians call an intractable problem.

Despite good work done by third sector agencies and the government, homelessness seems an intractable problem.

Has the top table got cold feet over tackling such an intractable problem?