Scientists debated the existability of microbial life beneath the planet's surface.

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

No other species in existence rivals the intelligence of dolphins.

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

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

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

Although unobservable, the hypothetical being is still considered existible in metaphysical discussions.

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

The reviewer noted that the word existant was repeatedly used as an adjective and recommended correcting it to the proper form.

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