Rate the following argument fragment on its writing, argument, and language skills:
Evidence: Animals like , mammals , and reptiles can do things human beings cannot and will never be able to do . Reptiles may be able to poision its prey but Humans can't . Mammals can eat a human alive Humans cant do that ! Each group can do something the other one can't . One thing they all have in common is that they breathe air ! If aliens existed they wound not be able to survive unless they had a ' suit ' on the 24/7 .

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