empty-headedness

Thayer loved luxury; but it must not be accompanied by empty-headedness.

Loquacity isn't always a sign of empty-headedness, nor is silence a sure proof of weight and wisdom.

Aiming firearms in fun at people is not empty-headedness solely but a form of hysteria.

They made all sorts of silly remarks about absentmindedness, only exposing their own empty-headedness thereby.