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.

And in an atheist's perspective, from our own morals, we should know that causing another death of a human being is highly unnecessary, considering that we all ready have them behind bars.
Valid

I am surprised at people who oppose the death penalty but are quite content to lock a human being up like an unwanted pet rat, for a lifetime.
Valid

by committing to the idea that someone deserves to die, you are committing to the revenge side of human nature, not the idea of punishment for crimes committed.

Valid