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.

Under English common law, the Castle Doctrine was intended to be a narrow exception to the general duty to retreat.
Invalid

Can you point to the last time a private individual was successfully prosecuted either in legal or civil court for the recognized offense of having violated the constitutional rights of another private individual?
Valid

At the same time, burglars also report that guns are of considerable value to them.... Interviews with active burglars suggest that they typically prefer items that are easy to carry, easily concealed, and have high 'pound for pound' value.

Valid