Why is it difficult to apply the Holistic Critical Thinking Scoring Rubric to tweets, slogans, gestures, or signs?

The Holistic Critical Thinking Scoring Rubric is a great tool to use to evaluate the quality of the critical thinking evident in lots of different situations. The key thing is that people have to express some kind of a reason or basis for whatever it is that they are saying. Hence, it is tough to apply the HCTSR to tweets, slogans, gestures, signs, billboards, and epithets because reasons are seldom given in those cases.