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.

Ex Input:
Psychology doesn't tell people nothing can be their fault, that they shouldn't take responsibility for their own actions.

Ex Output:
Invalid


Ex Input:
In fact, a recent CNN poll showed that 55 percent of Americans oppose gay marriage, so Prejean's stance is clearly within the mainstream of public opinion.

Ex Output:
Valid


Ex Input:
But, a liberal will say that the lowered value of a marriage is not real, it is only perceived due to the bigoted minds of the conservatives themselves.

Ex Output:

Valid