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:
The usual reason given for banning first-cousin marriage is because there is a risk of offspring of first cousins having biological problems.

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


Ex Input:
There have also been no scientifically documeted cases of gays changing their sexual orientation anymore than straights becoming gay.

Ex Output:

Valid