Webster's Revised Unabridged Dictionary · 1913

Incoherence

Incoherence , noun

[Compare French incohérence.]

1.
The quality or state of being incoherent; lack of coherence; lack of cohesion or adherence. — Boyle
2.
Lack of connection; incongruity; inconsistency; lack of agreement or dependence of one part on another; as, the incoherence of arguments, facts, etc.
Incoherences in matter, and suppositions without proofs, put handsomely together, are apt to pass for strong reason. — Locke
3.
That which is incoherent.
Crude incoherencies... and nauseous tautologies. — South

Also: Incoherency