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.

And Obama, going to foreign nations, bowing before dictators, and allowing them to accuse our nations of various crimes, and having the nerve to apologize for them.
Valid

Indeed, the right to keep and bear arms���which we have explained pre-existed, and therefore was preserved by, the Second Amendment���was subject to restrictions at common law.
Valid

Giles Hattersley finds out why so many young people feel obliged to carry knives.

Invalid