Noun
unsoundness (countable and uncountable, plural unsoundnesses)
The state of being unsound.
Perhaps no person can be a poet, or even enjoy poetry, without a certain unsoundness of mind. Thomas Babington Macaulay
My earlier views at the unsoundness of the Christian scheme of salvation and the human origin of the scriptures, have become clearer and stronger with advancing years and I see no reason for thinking I shall ever change them. Abraham Lincoln
Unsoundness in a slave, as well as in a horse, detracts materially from his value. If no warranty is given, a close examination is a matter of particular importance to the Negro jockey. Solomon Northup