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: If gay couples are allowed to marry then any combination of marriage should be allowed as long as it involves consenting adults.

A: Valid
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Q: I am routinely amused by people of prejudice, who obviously know little about gays, trying to tell gay people what gays are like...

A: Valid
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Q: Marriage has evolved over the years, and has involved different things in different times and cultures."

A:
Valid
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