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: And it is really sad that people like him complain about being called things like "bigot" and claim that there is no evidence for such things, and then go and say disgusting things like what you just quoted.
Example Output: Invalid

Example Input: What liberals want is a sound argument that proves to them that straight people's rights are being infringed upon.
Example Output: Valid

Example Input: Some people may think atheists are unintellectual; based on that premise, then atheists cannot give consent.
Example Output:
Invalid