The two noted that the "X-File in itself is an interesting concept, but left frustratingly vague."

But press her to demystify the production process and Ms. Cook is frustratingly vague.

The lyrics are frustratingly vague - who are you fighting, Kelly, and why?

"I make it twenty-three from here, Ma'am," Harkness said from the tac section after a moment, studying the frustratingly vague output of his passive sensors.

The late earl's journals had been frustratingly vague on all matters not connected with insects or tropical plants.

The photographs by David Muench and Robert Reynolds complement the text, although the captions are frustratingly vague.

In "John Henry Days," the sepia mood has produced an ambitious, finely chiselled work frustratingly vague in its resolution.

But most philosophers and historians soon came to the conclusion that Kuhn's signature concept of the paradigm was frustratingly vague.

Mr. Dukakis's talk of cracking down on tax evaders and cutting Government waste is frustratingly vague.

Mr. Brown can be frustratingly vague.