Argument错误（思维训练）

Argument（65~80）
From Samantha, CUFE
65.The following appeared in the promotional literature for Cerberus dog food.
“Obesity in humans is typically caused by consuming more calories than the body need. For humans, a proper diet for losing weight is a reduced-calorie diet that is high in fiber and carbohydrates but low in fat. Therefore, the best way for dog owners to help their dogs lose weight in a healthy way is to restrict the dog’s diet to Cerberus reduce-calorie dog food, which is high in fiber and carbohydrates but low in fat.”
论据一：Obesity in humans is typically caused by consuming more calories than the body need.
反驳：错误类比，对于humans来说肥胖的原因是calories的过度摄取，对于pet dogs来说不一定如此，有可能是因为饮食结构的不合理，也有可能是由于一个正常的摄入量和一个低水平的运动量的结合。
论据二：For humans, a proper diet for losing weight is a reduced-calorie diet that is high in fiber and carbohydrates but low in fat. Therefore, the best way for dog owners to help their dogs lose weight in a healthy way is to restrict the dog’s diet to Cerberus reduce-calorie dog food, which is high in fiber and carbohydrates but low in fat.
反驳：错误类比，a reduced-calorie diet对于人类来说或许是一种好的减肥食谱，然而对于pet dogs来却不一定适合，因为人体所需要的营养和人类的消化系统与pet dogs还是有很大的来源于物种的差异的。
此外，哪怕文中所提及的reduced-calorie diet，即高纤维、高碳水化合物，低脂肪的减肥食谱对于pet dogs来说同样适合，对人对pet dogs来说都只是一种proper way to lose weight，并不能推出将pet dogs的饮食限制于这样的食谱是最佳的为pet dogs减肥的方法（best way for…to…），一定有许多其他的方法能够帮助pet dogs减肥，比如运动减肥法，药物减肥法。特别需要强调的是，每一只pet dog个体health condition和体质都不同，作者以偏概全一概而论的方法是片面（one-sided; unbalanced）、不负责任的（irresponsible; casual）。
更甚，即使这样的食谱的确是唯一的最好的pet dogs减肥食谱，Cerberus也绝对不是唯一的选择，市面上还会有很多牌子的dog food的营养配方遵循这样的食谱。
总体说来，作者所提供的证据（evidence）无法支持作者的结论。