Rate the following argument fragment on its writing, argument, and language skills:
Evidence: While describing why scientists consider visits to venus, the author states "Astronomers are fascinated by Venus because it may well once have been the most Earth-like planet in out solar system...The value of returning to Venus seems indisputable"(4).

By presenting that scientists want to visit Venus then almost immediately jumping to the weak conclusion that the "value of returning to Venus seems indisputable", the author fails to explain why the scientists want to visit Venus and why those reasons are important or significant.

Without an explanation of facts, writers leave the reader to create conclusions in their own minds, possibly without a complete understanding, weakening the authors support of his or her own claim or idea.

Score: 2