premise: an animal is a kind of living thing sent2: a bird is a kind of animal sent3: if two things have the same features then those two things are alike sent4: if things can be identified as different because of something then they are distinguishable by that something sent5: a bird is a kind of object sent6: the parts of an object are features of that object sent7: feathers are a part of a bird sent8: a mammal is a kind of object sent9: fur is usually part of a mammal.
hypothesis: if fish die then there will be more food for scavengers