1736. Bailey (fol.), Addit., Unsolidity, unsolidness, unsoundness.
1802–12. Bentham, Ration. Judic. Evid. (1827), V. 22. Wearing on the face of it a proof of its own injustice, a proof of the unsolidity of the ground.
1889. Atlantic, May, 655/2. The pen that has indulged itself to an extent disproportionate … to the apparent unsolidity of its topic.
