Sheldon works in the IT department. He is the IT lead on a cross-company plan to update the company's website. Sheldon has repeatedly told the project team that he needs changes by noon each Friday because of code freeze, but he has never defined "code freeze" for his non-IT coworkers. Bill, a non-IT coworker, submits a change to Sheldon at 3 p.m. on Friday that he feels must be actioned immediately. What barrier to effective communication is illustrated by this example