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.

Example Input: Even if it was certain that allowing same-sex marriage would allow these forms of marriage, that would only be a downside of legalizing same-sex marriage, it wouldn't be a reason that same-sex marriage itself is wrong.
Example Output: Valid

Example Input: That way we can keep the sanctity of marriage between a man and a woman, and gays can still have a "union" with other gays.
Example Output: Valid

Example Input: If you like, we can talk about Arab nations who prefer to have sex with little boys, and just use women for reproduction.
Example Output:
Invalid

