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 the case of same-sex marriage, homosexuals are completely denied equality, for they are not even allowed the same marriage benefits that others recieve without changing their sexuality.

SOLUTION: Valid

PROBLEM: True, the courts have ruled that denying gay people the right to marry is a violation of their human rights.

SOLUTION: Valid

PROBLEM: Not wanting to have a child who would not be considered his, he engaged in an elementary (and quite unreliable) method of birth control: coitus interruptus.

SOLUTION:
Invalid