Many questions about consciousness exist even among scientists.

No other species in existence rivals the intelligence of dolphins.

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

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

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.

In her research notes, she listed several hypothetical existences that might explain the anomalies.

Long before humans arrived, an entire ecosystem existed here.

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

Her sudden realization of the universe's existence filled her with both awe and dread.