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.

My point was that there are ways of dealing with violent criminals, murderers even, without executing them.
Valid

From the view of the overall benefit to society as far as safety and economics, is is a better solution to put violent criminals to death.
Valid

I am against the death penalty because we have an imperfect justice system in the U.S. Mistakes are inevitable and not worth any perceived benefit.

Valid