Rate the following argument fragment on its writing, argument, and language skills:
Evidence: The author mentions that no spacecraft has survived on Venus: "...no spacecraft survived the landing for more than a few hours" (The Challenge 2). Since these missions have been unmanned, there is not much loss except for the spacecraft itself, but if there had been a human aboard, the loss would be tremendous and nothing would be gained from the mission. The conditions of Venus simply will not allow manned missions for closer examination of the planet.

Score: 2