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.

Example Input: If later exculpatory evidence comes out... there is no reversing the punishment.
Example Output: Valid

Example Input: Still, in some cases death penalty would be the right thing to do (no point keeping mentally insane murderers just locked up for their whole life, although there could be some ways to use them).
Example Output: Valid

Example Input: I think at least if they are innocent they would be happier as I am living without that safety net than being killed because we don't think they should have a right to fight for thier lives leagally.
Example Output:
Valid