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: The movement for gay rights and LGBT equality is doomed to failure, or at the very least a fatally slanted naming convention (equality is equal if we are both trying to be like a standard model).
Example Output: Valid

Example Input: The issues of being black are not merely related to the single physical attribute of skin color.
Example Output: Invalid

Example Input: We are not longer primitive, so we should allow any couple to marry, as we already allow with straight couples who do not have children.
Example Output:
Valid