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: In either case, it is a weak argument for the RC being anti-gay, since homosexual sex is just one of a hundred or so "risk factors" that disqualify one from donation.

SOLUTION: Valid

PROBLEM: Americans 100 years ago commonly argued that immigrants should not receive equal treatment under the law because they were allegedly morally inferior to native-born white Americans.

SOLUTION: Valid

PROBLEM: Although this isn't my primary argument, it can easily be seen that same-sex marriage provides benefits equal to that of opposite-sex marriage and far greater than that of allowing a single individual to marry.

SOLUTION:
Valid