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.
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Question: After we get through that, if he still retains the death penalty, it's a lot cheaper to kill him than to keep him up 'til he dies in prison.

Answer: Valid


Question: it wouldnt even exist if it werent for the human mind.

Answer: Invalid


Question: I support the death penalty, but feel there needs to be a better system of checks and balances to ensure each individual gets a fair trial using all evidentiary methods available.

Answer:
Valid