Dolphins Aren’t Mammals
Dolphins are fish, according to this person. We’re all just misinformed. Dolphins are mammals because they’re warm-blooded, nurse their offspring with milk, and have lungs to breathe oxygen from the air. By definition, dolphins are mammals. Just because they look like fish, swim with fish, and reside in the ocean doesn’t mean they are fish.
It disappoints us that we have to look back at our elementary education to find the answer. We learned this stuff in 3rd-grade science class, and it’s stuck with us ever since. Now, just because you found information that you don’t intuitively agree with doesn’t make it wrong. Also, Wikipedia is becoming a reputable source of information, due to the countless people who dedicate their time to proofread every article (consider donating to Wikipedia).