TASK DEFINITION: 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.
PROBLEM: Quite frankly, one absolute certainty in science regarding homosexuality is that being gay IS NOT a "choice".

SOLUTION: Valid

PROBLEM: A gay person could hit his spouse, a straight person could also do so, or a sibling marriage could have a baby with birth defects.

SOLUTION: Valid

PROBLEM: Anyone can be gay but only homosexuals are sexually attracted to their own sex.

SOLUTION:
Valid