From a paper I am reading:

"Cognitive competence comprises aspects such as [...] coherence and cohesion of thinking and of the discourse manifesting it" (Lehmann, C., Language Competence. Theory and Empiry, 2007).

Isn't coherence a property of discourse? Can thoughts as well be organized in a coherent if not cohesive way?

Where do I find discussion of this topic from a cognitive perspective?