Consider the following arguments:

(a) “I went over to our supplier's warehouse today and talked with the secretary, who was unbelievably rude! Since he is the only representative of our supplier that | have met, my only conclusion is that everyone who works there must be rude.”

(b) “Lyle Biggerstaff, CEO of a large corporation, was able to avoid a lawsuit brought by a customer because he had taped a previous telephone conversation in which the cus- tomer both requested unsafe changes in the product and promised not to hold the corporation liable for the consequences of those changes. Given his experience, our company should tape all telephone conversations.”

“All purchases over $100 must originate with a purchase order form. Last week, the data-processing manager purchased a $4,000 computer. Therefore, there must have been a purchase order form.”

(d) “Almost everyone in the accounting department is a member of the AlICPA—the few who are not members either are not ambitious or are careless.”
Required: For each argument, indicate whether it is sound and why, or why not. If it is not sound, what would make it sound? T-Y1