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]: JUSTICE STEVENS believes that the unitary meaning of ���keep and bear Arms��� is established by the Second Amendment's calling it a ���right��� (singular) rather than ���rights��� (plural).
[A]: Valid


[Q]: Then compare it to areas with less gun control laws, such as Texas and Arizona (where concealed carry permits are fairly easy to obtain).
[A]: Valid


[Q]: ��� Trafficking in new firearms, interstate and intrastate, including by federally licensed firearms dealers, large-scale straw purchasers or straw purchasing rings, or small-scale straw purchasers from gun stores, gun shows, or other premises;
[A]:
Valid