TASK DEFINITION: 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.
PROBLEM: What would the U.N. recommend that victims do when they face criminals by themselves?

SOLUTION: Valid

PROBLEM: One can only speculate that the ban made crime skyrocket.

SOLUTION: Valid

PROBLEM: Republican 2008 presidential hopeful Senator John McCain is standing by his view that the Constitution guarantees everyone the right to carry a weapon although "obviously we have to keep guns in the hands of law-abiding citizens".

SOLUTION:
Valid