What does "untenableness" mean?

The quality of being untenable.

Untenableness

Common synonyms include: credibility gap, implausibility, incongruity, inconsistency, irrationality, unreasonableness.

noun

noun ·Rare ·Advanced level

Noun

1
The quality of being untenable. uncountable
"...it by no means follows that he is convinced of the untenableness of his views."

"...it by no means follows that he is convinced of the untenableness of his views."

From untenable + -ness.