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: The death penalty is not used for what it is supposed to be used for.

SOLUTION: Valid

PROBLEM: Not to put too fine a point on it, but all southern states.

SOLUTION: Invalid

PROBLEM: Indeed, the justice system is not perfect, but it is better and more acurate than ever before.

SOLUTION:
Invalid