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.

If the concept of 'harm' is to decide whether or not gay people should be allowed to redefine the institution of marriage, then gay rights groups have little to stand on.
Valid

I find the funniest thing about such studies is that everyone has heard of them and is sure something has been shown conclusively, but no one is quite sure when or where.
Invalid

The Oxford English Dictionary is descriptive; it does not tell us what words should mean; it tells us how people actually use words in real life and have used them in the past.

Invalid

