If simple language contains vague words such as “soon” and “later,” which weakness remains?

Correct answer: Lack of specificity and concreteness.

Simple vocabulary improves readability, but vague time words do not tell the receiver exactly when an action is required. The message therefore still lacks specificity and concreteness. “Send it soon” is weaker than “Send it by 5 p.m. today.” The issue is not language barrier, confidentiality, or the number of sources.