There was nothing merely theoretical in his duty to preserve these rights.

His teaching was not merely theoretical, but was also imbued with an intense ethical power.

Pathology developed from merely theoretical lectures to an active tool in learning the mechanisms of diseases, and their behavior, management, and control.

In actual security practice, the attacks assigned to such adversaries are often seen, so such notional analysis is not merely theoretical.

Palmer's belief in holiness was not merely theoretical.

It's not merely theoretical; many ludicrous cases have been prosecuted.

Advocates of laissez-faire capitalism generally argue that permanent natural monopolies are merely theoretical.

The risk of war with the US was increasingly regarded as merely theoretical, as there were very few policy differences between the two countries.

Their claim rests on a commitment that until recently was regarded as merely theoretical.

At present, plasma weapons are merely theoretical, as currently they need more power than any handheld device could supply.