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.

It is clear keeping them in prsion would be far more expensive in this case.
Valid

Even though you deny it, your statements show you have no problem executing innocent people.
Valid

If we had the old system back, executing someone would be very cost effective.

Valid