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:
Societies define marriage, because they find it a valuable institution for many reasons, such as raising children, providing financial and legal protection for families, and other such good things.
answer:
Valid


question:
Removing the polygamy bans would work both ways as well, women could marry multiple men.
answer:
Valid


question:
As far as explaining the world to your children: Why not just explain that some people love other people who happen to be the same sex as they are?
answer:

Valid