The nonexistence of Father Christmas and the Tooth Fairy came as something of a shock.
The problems of city life faded to nonexistence.
He opened the envelope and read the note, his lips thinning down almost to nonexistence.
Leah Remini (King of Queens) claims reports of baby Suri's nonexistence have been exaggerated.
Particular statements have a positive valence because they assert existence; universal statements have negative valence because they assert nonexistence.
No amount of negative results can prove the nonexistence of psi.