the mind > mental capacity > lack of understanding > foolishness, folly > absurdity, incongruity > [adjective] > of persons (3)
Of a person: acting in an incongruous, unreasonable, or illogical manner.
Of a person: acting or speaking in an irrational or inappropriate manner; absurd; foolish. Obsolete.
of, pertaining to, or resembling a goon (senses 1 4).