The first part of the competition requires the students to complete three theoretical problems within five hours.

This gave South an interesting problem, both theoretical and tactical.

He seems to have recommended something too simple, which does not touch the theoretical problem of suffering.

However, there are theoretical and empirical problems with this claim.

Here we return to the theoretical problem of how the other can be articulated as such.

Far from being the concrete, it has always rather been the theoretical problem.

Wave a new theoretical problem in front of him, and stand back!

So, and as you said, Leo, it's not even really clear that this is more than sort of a theoretical problem.

That was only a theoretical problem, though; she didn't think she'd missed a shot tonight.

Despite its theoretical and potential problems, this approach is widely used.