invalidness
in·va·lid·ness
noun
1.
illogicality as a consequence of having a conclusion that does not follow from the premisses
Origin
From invalid + -ness.
Related words
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WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.