Sentence examples for the most intractable from inspiring English sources

But the most intractable problem of all remained the economy.

Such problems are among the most intractable in mathematics.

So the virtual companies are being forced to grapple with the most intractable physical issues.

Heroin is among the most immediate — and the most intractable — social, economic, and political problems.

Collective violence is one of the most intractable problems of policing.

He has set out to dramatise the question of truth, the most intractable question of all.

Does Obama believe that even the most intractable enemies can be pacified with diplomacy?

Public education is one of the most intractable problems the city faces.

These findings have turned protein folding into one of the most intractable problems in biology.

Throughout his long career, Mr. Alm took on some of the most intractable of problems.

One of the most intractable hurdles has proven to be Turkey's history with the Kurds.