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.

HOW does that lead to ANY conclusion that "polygamy" is the solution???
Invalid

A valid argument against incestuous marriage would not have as its only premise "Marriage is defined as a legal bond between a man and a woman who are not x-apart related."
Valid

And as I pointed out, "most people who oppose gay marriage" are actually opposing gay marriage because they very much oppose gays in general.

Valid