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.

A federal just has struck down as unconstitutional California's ban on same-sex marriage.
Valid

Nevertheless, I think that if people are using guns to kill people, the people using them are to blame, at least more so than anyone else.
Invalid

It WILL take a Constitutional amendment for it to say that homosexuals are less than equal.

Valid