A person who is unable to express thoughts in an orderly manner is described as being what?

A person who is unable to express thoughts in an orderly manner is described as incoherent. This term specifically refers to speech or writing that lacks clarity and logical organization, making it difficult for others to understand the intended message. Incoherence can manifest in various ways, such as vague or disjointed ideas, which can result from a number of factors including emotional distress, cognitive impairment, or intoxication.

The other terms have distinct meanings that do not align with the description in the question. Being cognizant refers to being aware or having knowledge of something, which does not necessarily relate to the ability to articulate thoughts clearly. Rational indicates the quality of being reasonable and logical, which contrasts with the concept of incoherence. Concise describes a style of communication that is brief and to the point, which again does not correlate with difficulty in expressing thoughts clearly.