In this task you will be given a claim and a perspective. You should determine whether that perspective supports or undermines the claim. If the perspective could possibly convince someone with different view, it is supporting, otherwise it is undermining.
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Question: claim: Gay marriage should be legal.
 perspective: Marriage is for procreation and should not be extended to same-sex couples because they cannot produce children together. 

Answer: undermine


Question: claim: Same sex relationships should have the same legal status as heterosexual relationships under EU law.
 perspective: We can reduce the prevalence of psychological disorders in the gay community by allowing gay marriage. 

Answer: support


Question: claim: Science can determine human values.
 perspective: Science shouldn't be prescribing what we do.

Answer:
undermine