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: Unless some solid benifit can be shown for killing them, it is simply a childish act of revenge.

SOLUTION: Valid

PROBLEM: One must be subject to requirements of "appropriateness" when defending against rapists and murderers forcing themselves into one's own dwelling.

SOLUTION: Invalid

PROBLEM: As for the death penalty's ineffectiveness in the United States, I would attribute it to the fact that it is not done enough, and it's always carried out away from the public eye.

SOLUTION:
Valid