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.

Q: Some of the social changes we have experienced over the last century have made biology less important and people's social roles in creating families more important.

A: Valid
****
Q: If there are cases where we can not determine what sex a person is, how can we determine if they are homosexual or not?

A: Valid
****
Q: Because it is not between a man and woman, it is not right to call this a 'marriage', in saying this, I am in no way trying to demean the relationship two people of the same gender can have.

A:
Valid
****