> as lemmas

1602 W. Watson Decacordon Ten Quodlibeticall Questions 343 The non validity of bulles.

1864 S. D. Carpenter Logic of Hist. (ed. 2) 75/1 The non validity of the fugitive law.

1952 W. V. Quine Methods of Logic §9. 50 Interchange of equivalents..preserves consistency, nonvalidity, nonimplication, and nonequivalence.

1994 N.Y. Rev. Bks. 23 June 8/4 I feel obliged to give my own impressions..of the validity or non-validity of the charges so cruelly and persistently raised against him.