Nestl$\text{'}$s marketing of Good Start infant formula promoted the product as hypoallergenic. However, some severely milk$-$allergic infants experienced serious side effects after using Good Start, including convulsive vomiting. A Nestl$$ vice president defended th$$ claim and product, saying, "I don't understand why our product should work in $100$ percent of cases. If we wanted to say it was foolproof, we would have called it allergy$-$free. We call it hypo$-,$ or less, allergenic." The vice president's statement exemplifies which philosophy?