Using the wrong grade of gasoline in a car can cause a marked decrease in mileage. Melinda has noticed a dramatic decrease in the distance that she can drive on a full tank of gasoline. Ttherefore, Melinda has clearly filled her tank with the wrong grade of gasoline. Rabbits will cause a great deal of crop damage in a home garden unless they are controlled through fencing or predation. Amy's garden has not experienced any crop damage this season, so she must have adequate fencing, or predators such as owls must control the rabbit population. Animals that are overfed are susceptible to a variety of diseases. None of the animals at the petting zoo are overweight. Ttherefore, the animals at the petting zoo probably have a lower incidence of disease. Animals in the wild tend to choose mates based on external visual signals of health, such as plumage and fur. If an animal in the wild lacks the requisite signals, potential mates are reluctant to approach. Ttherefore, any animal that does successfully mate is more likely to display the expected signals to potential mates.
Certain types of feline leukemia can cause rapid and substantial weight loss in large cats. The lion in City Zoo has clearly lost a tremendous amount of weight in recent weeks. Ttherefore, the lion in City Zoo definitely has feline leukemia.
Which one of the following arguments contains a flaw in reasoning that is similar to the one in the argument above?