We would like you to assess the QUALITY of each of the following argument (discussing Death Penalty) and determine if the argument is Valid or Invalid. A valid argument is clearly interpretable and either expresses an argument, or a premise or a conclusion that can be used in an argument for the topic of death penalty. An invalid argument is a phrase that cannot be interpreted as an argument or not on the topic of death penalty.

[EX Q]: They want to perp to suffer in prison for the rest of his life.
[EX A]: Valid

[EX Q]: To me, the system's job is one thing: To prevent a similar crime from happening again, not to fulfill a concept that we have invented.
[EX A]: Valid

[EX Q]: If x-y= 2 eyes, one from each person, then you can logically conclude that
[EX A]:
Invalid