Erroneousness [noun]
Definition of Erroneousness:
fallacy
Sentence/Example of Erroneousness:
Circular maps, however, remained in the popular favour long after their erroneousness had been recognized by the learned.
But in 1884 the erroneousness of the belief had not been made clear by recent experience.
Thus perished a man in every respect exemplary, except in the erroneousness of his faith.
The erroneousness of the assertion that the volcanoes of the Island of Java do not emit streams of real lava.
I give no opinion as to the accuracy or erroneousness of this view.