The existence of a commercial translation is often used to distinguish between "scholia" and "commentaries".

The existence of the circle-ellipse problem is sometimes used to criticize object-oriented programming.

The potential existence or uniqueness of normal forms can be used to classify and describe certain rewriting systems.

During 100 Group's existence over 32 different devices were evaluated and used.

A separate analysis considered whether the existence or absence of a law could be used to predict whether abortions went up or down.

But if they are caused, their existence cannot, after all, be used to falsify the thesis of determinism.

The existence of a market failure is often used as a justification for government intervention in a particular market.

Its existence was used only for comparison purposes to reach the final inequality.

The University feared that the existence of such facilities would be used for the promotion of student activism.

The existence of such conflict could be used to justify the bureaucracy's claim to universality (Lefort 1986).