lack of validity
It is not permitted and so has no property other than invalidity.
D.G MOOK has written: 'IN DEFENSE OF EXTERNAL INVALIDITY'
Sources of internal invalidity in research studies include confounding variables, selection bias, measurement bias, and researcher bias. These factors can affect the internal validity of the study results and make it difficult to draw accurate conclusions about the relationship between variables.
Thomas Blackhall has written: 'The invalidity of lay-baptism proved from scripture, and confirmed by the doctrine of Catholick antiquity, and of the Church of England'
invalidator - an official who can invalidate or nullify; "my bank check was voided and I wanted to know who the invalidator was" voider, nullifier functionary, official - a worker who holds or is invested with an office
In invalid argument is one in which the premises do not necessitate the truth of the conclusion. An argument's validity or invalidity does NOT depend on the actual truth of the premises, just what they would entail IF they are true.
Kanagawa
The Treaty Of Paris
It is an accomplishment to pursue a successful career as a painter in spite of her invalidity.
it was a good treaty.
Treaty is a noun.