knotty problem

He would say very little, however, and seemed to be concentrating on a knotty problem.

It would be a long time before he found a solution to this knotty problem.

Forecasting demand is one of the knottiest problems in the business.

"So, what other knotty problems did you solve at dinner?"

With a shrug, Tom dismissed the knotty problem from his mind.

So we were spared the knotty problem of a trial between species.

On one side was the student with a knotty problem in research methodology who came to her for guidance.

The new law is meant to address a knotty problem that has confronted more than half the states since 1971.

Yet we love a character who is clever enough to think of solutions to knotty problems.

And in fact patient research has gone a long way towards resolving this knotty problem.

Lee looked for the bold stroke that might cut through the knotty problem.

But the hard fact is that there are a number of knotty problems and some of them have come through my own hands.

Perhaps the knottiest problem, though, has been deciding what scientific evidence or testimony should be considered in the first place.

Agricultural policy is a knotty problem in the accession negotiations.

I have had many letters from knitters asking for help with knotty problems.

The challenge was formidable, even for someone accustomed to attacking knotty problems.

There's another knotty problem, too: getting the names of your songs and albums into the machine's little head.

"A knotty problem to be faced with in the middle of the night, I'll admit that.

The Bush pledges will, however, create some knotty problems.

To be so openly in the world, with all its temptations, poses knotty problems.

He used to be the chairman of the appeals committee at national championships, dealing with knotty problems far into the small hours each night.

Brahms began to work this knotty problem through, inarticulately, in music alone.

It was a knotty problem, even in theory.

That is an easy answer to a knotty problem, but closer attention to the changes in weather may also be the answer.

One potentially knotty problem could be the degree of secrecy concerning nuclear weapons.