Incoherent

Part of speech: adjective (a.)

1. Not coherent; wanting cohesion; loose; unconnected; physically disconnected; not fixed to each; -- said of material substances. Woodward.

2. Wanting coherence or agreement; incongruous; inconsistent; having no dependence of one part on another; logically disconnected. "The same rambling, incoherent manner." Bp. Warburton.