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.

Ratify a new constitutional amendment explicitly spelling out that no government in America may ever pass any law that would blanketly ban the ownership or purchase of any model firearm, component or ammunition.
Valid

Long the dominant view of the Second Amendment, and widely accepted by the federal courts, the collective rights model has recently come under strong criticism from individual rights advocates.
Valid

The killers in the Columbine massacre obtained three guns via a straw purchase by another student, acquired their automatic from a gun dealer and purchased a fourth from a seperate student.

Valid