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: 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.
Example Output: Valid

Example Input: I think that Supreme Court rulings must focus on interpreting the meaning of the constitution, and not simply be political opinions issued on the basis of nothing.
Example Output: Invalid

Example Input: High-risk behaviors include intravenous (IV) drug use, anal or homosexual sex, sex with a prostitute, sex with a partner who has high-risk behaviors, or exchange of sex for money or drugs.
Example Output:
Invalid