A group of dedicated home chefs has evaluated the new Gourmet Chef knife set. They found that with these knives, they could achieve precision cuts that were previously only possible with their older, less sharp knives, despite the older knives being heavier and having a larger blade length. Based on these home chefs' experiences, any serious home cook should consider purchasing the Gourmet Chef knife set for their culinary needs. Which one of the following most seriously undermines this argument?