Rate the following argument fragment on its writing, argument, and language skills:
Evidence: This reason of his is,"It may well once have been the most Earth-like planet in our solar system" (Paragraph 4). The problem with this is that it does not go very deep into why it being similar to Earth matters. A scientist at NASA might understand any signifigance in that statement, but an average person might not. For that reason it is a very weak argument.

Score: 2