Scholars debated whether the mountain spirit was an existent or merely a legend.

Many questions about consciousness exist even among scientists.

Her sudden interest in philosophy made her question the very existance of free will.

In mathematical logic, there exist statements that are true but cannot be proven within the system.

The novel described a hidden society of existers who coexisted quietly alongside ordinary people.

In the corner of the old map, there exists a hidden island that sailors once feared.

Her sudden interest in metaphysics led her to question the very existency of the self.

The scholar debated whether the multiple existencies recorded in the chronicle referred to the same person.

No other species in existence rivals the intelligence of dolphins.

The new theory suggests that a parallel timeline could be existable under specific conditions.