Many who were at the Chicago meeting said they had thought the debate was purely theoretical.

Until now, all of these had been purely theoretical.

"My approach has been purely theoretical, with no thought to consequences."

Until a real-life application was found for what had been purely theoretical.

"From a purely theoretical point of view it makes sense," he said.

However, that was as yet only a purely theoretical declaration.

But don't think for one minute that his interest is purely theoretical.

The report, published in March 2006, was purely theoretical and made no reference to any of the cases.

And maybe your interest is a little more than purely theoretical?

Anything else is purely theoretical as it has no impact on the world.