TASK DEFINITION: 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.
PROBLEM: However, a person convicted of a capital crime is BY OUR OWN DEFINITION NOT INNOCENT.

SOLUTION: Valid

PROBLEM: I think only certain people deserve to have the death penalty.

SOLUTION: Valid

PROBLEM: US prison inmates live better than over half the world population and their only drawback (albeit a significant one) is their confinement.

SOLUTION:
Valid