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: Punishment as a concept DOES encompass killing as a possible form of punishment.

SOLUTION: Valid

PROBLEM: If you're arguing for a general principle (eg that Capital punishment is acceptible and effective) then you have to argue in the general case:

SOLUTION: Valid

PROBLEM: Republicans tend to think that anyone accused in a domestic court is guilty, and liberals tend to think that anyone of the military accused is guilty.

SOLUTION:
Invalid