instruction:
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.
question:
Anyone who supports anything but a flat tax has no ground to stand on for demanding equal benefits.
answer:
Invalid


question:
Then twist around words to fit in this weird idea you have that somehow gays are discriminating against you by wanting to get married.
answer:
Valid


question:
To legalize same-sex marriage is a move to strengthen families, not to weaken them.
answer:

Valid