Vacuousness n. : The quality or state of being vacuous; emptiness; vacuity.

Example:
Why does society prioritize happiness over unhappiness while both emotions are vital to human development?

Taxonomy
vacuousness, Synonyms, emptiness, Dictionary, vacuous, vacuity, ness, state of being, Thesaurus, WordNet, Unanswered questions, Howard Jones, Original Soundtrack, barrenness, blankness, hollowness, inanity, Calle 13.

Defination from the web:
... WordNet: vacuousness. Top. Home > Library > Literature & Language > WordNet. Note: click on a word meaning below to see its connections and related words. ...