TASK DEFINITION: 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.
PROBLEM: Marriage is indeed a 'straight thing', and gay groups have taken a wholesome institution and used it to validify their sexual vices.

SOLUTION: Valid

PROBLEM: If one does not, then the correct path is to seek to amend the Constitution to exclude gay citizens, and this the GOP has repeatedly sought to do.

SOLUTION: Valid

PROBLEM: Well, if that's a reason to ban homosexuals from marriage, then along the same line of thought, then any couple that is infertile or chooses not to have children should not be permitted to get married.

SOLUTION:
Valid