'Invalidness' definitions:

Definition of 'invalidness'

noun

Illogicality as a consequence of having a conclusion that does not follow from the premisses [syn: invalidity, invalidness]

Definition of 'Invalidness'

From: GCIDE

Invalidness \In*val"id*ness\, n. Invalidity; as, the invalidness of reasoning. [1913 Webster]

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