Webster's Revised Unabridged Dictionary · 1913

Plausibility

Plausibility , noun

[Compare French plausibilité.]

1.
Something worthy of praise. [Obsolete]
Integrity, fidelity, and other gracious plausibilities. — E. Vaughan
2.
The quality of being plausible; speciousness.
To give any plausibility to a scheme. — De Quincey
3.
Anything plausible or specious. — R. Browning