Problem: The plumber told Mr. Welson, "If I don't fix that leak, then I won't send you a bill." The plumber worked on it for five hours but couldn't fix the leak because the plumbing was in too much of a mess and needed major repairs first. But Mr. Welson didn't want to have the major repairs done, because he was planning to sell the house soon. The plumber figured that it wasn't his fault that he didn't fix the leak, so he billed Mr. Welson for five hours of work. Did the plumber lie to Mr. Welson? (From Critical Thinking, Anita Harnadek, 1998) Need Assignment Help?