PT15.S3.Q18

peterm1999

Just wondering if anybody could explain this sufficient assumption question (PT 15 S3 Q18)

robotsoap

The argument concludes that all genetic mutations are random. This is a bad conclusion because the only evidence it shows are experiments with bacteria who exhibit random mutations. The argument only provides us with information to conclude that perhaps genetic mutations in bacteria are random, not that every single genetic mutation for every organism is random.

In order for this conclusion to make sense, we have to somehow find a premise that proves genetic mutations in bacteria are universally representative for all genetic mutations. And that is exactly what A does. If it's true that "either all genetic mutations are random or none are random", then just one instance of an organism exhibiting a random genetic mutation can prove the conclusion that all genetic mutation is random.

peterm1999

Thank you so much!