Melchior: Some studies have linked infants' consumption of formula made from cow' s milk to subsequent diabetes. Nonetheless, parents should feed cow' s milk formula to their infants. After all, cow' s milk is an excellent source of several nutrients important to infants' development. The reasoning in Melchior's argument is most vulnerable to criticism on the grounds that it ['defends a certain practice on the basis that it has a certain benefit without considering whether an alternative practice has the same benefit', 'inappropriately introduces normative claims in support of a conclusion that is entirely factual', 'confuses an absence of evidence in support of a claim with the existence of evidence against a claim', 'draws a conclusion that simply restates a claim that is presented in support of that conclusion']