We would like you to assess the QUALITY of each of the following argument (discussing Gay Marriage) 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 gay marriage. An invalid argument is a phrase that cannot be interpreted as an argument or not on the topic of gay marriage.

[Q]: They could not find a single legal expert or constitutional expert who was willing to say such a ban even MIGHT be constitutional, so they went after the amendment.
[A]: Valid


[Q]: And people who oppose gay marriage, what's the difference between giving equal rights through a civil union and marriage?
[A]: Valid


[Q]: The conservatives would argue that by offering same sex marriage that their persute of happiness is denied by gay people even existing and that they have to look at us.
[A]:
Valid


