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

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

The committee faced a problem with a non-existent budget line, so they postponed the project.

Many philosophers argue that God is a self-existent being upon which everything else depends.

She discovered a pre-existent manuscript hidden behind the false wall.

Some species on the island pre-existed the arrival of humans.

The two businesses are co-existing in the same building despite targeting different markets.

Several species of plants co-existed in the harsh desert environment.

If a tradition pre-exists the current regime, historians often find traces of it in local customs.

A fragile peace co-exists with deep resentment in the region.