We would like you to assess the QUALITY of each of the following argument (discussing Gun Control) 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 gun control. An invalid argument is a phrase that cannot be interpreted as an argument or not on the topic of gun control.

Q: 21 Most American gun owners are not violent criminals and will not be potential killers.

A: Valid
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Q: For decades we have proved drug cases by having a scientist who tests the drug submit an affidavit which says ���its cocaine��� or ���its marijuana������without having to call the scientist to testify about his findings.

A: Invalid
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Q: Or that the police can be sued for damages when they choose to break the law to persecute an innocent bystander?

A:
Invalid
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