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.

I for one do not say that registration of all privately held firearms would violate the constitution.
Valid

Every fear of theirs is there in your positions; you use the words to invent a regulating power, you use the words to erect strict conditioning and qualifications on the right merely recognized and secured by the Amendment.
Valid

Calibre Press, a well-known publisher/distributor of -officer-survival material, appropriately stated that this officer���s death ���serves as a grim reminder that red laser dots should, for good reason, cause police officers serious concern.���

Valid