You have nothing to lose except your illusions, and, in most cases, it's proved to be a worthwhile exercise.

If not, then I don't think it was a worthwhile, or particularly valid exercise.

Rewording is a worthwhile exercise because it forces you to come to terms with language.

If this episode helps one person it will have been a worthwhile exercise.

This was a worthwhile exercise which gave rise to a number of alterations.

Still, even critics of Oregon's plan say it was a worthwhile exercise.

Setting up the committee has been a worthwhile exercise.

Time is at a premium, but this is a worthwhile exercise.

To at least imagine an answer is a worthwhile exercise.

If it takes a lot of explanation from you before they can see the point, is it a worthwhile exercise?