Passage Summary: Critics claim genetic engineering is wrong because it alters DNA, but the scientist points out we've been doing exactly that for ages with farm animals. Since we've been doing it forever, the scientist thinks it's fine.

Conclusion: Modern genetic engineering should not be considered unethical.

Reasoning: Selective breeding is a basic form of genetic engineering that has been practiced for thousands of years, and critics fail to recognize this historical precedent.

Analysis: The scientist is relying on a classic 'it's always been this way' defense, but the logic has a massive hole. To conclude that genetic engineering is ethical based on its similarity to selective breeding, one must assume that selective breeding itself is ethical. If selective breeding were also a moral disaster, the scientist's comparison would actually support the critics instead of refuting them. Look for an answer that bridges this gap by validating the morality of traditional breeding practices.