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.

There are many abstracts (short summaries of the entire paper) printed in this link.
Invalid

This site has many cost studies from various states, including Florida and Texas.
Valid

For every time the state wrongfully punishes someone with impunity, it leaves the rest of us equally susceptible to the scourge of error-bound agents of the state.

Valid