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.

Ex Input:
The medium of 'free speech' has changed, but that does not affect that free speech should still exist - just as with the other constitutional points (with a few exceptions, if you believe Bush).

Ex Output:
Valid

Ex Input:
If a gun owner knowingly sells to a prohibited felon who commits a murder with the gun, then the felon alone is responsible for the murder.

Ex Output:
Valid

Ex Input:
Are you saying that people have a right to benefit from having a police force, a military, a fire department, a court system, public schools, etc. but pay nothing for it?

Ex Output:
Valid