If you pull up on a dog’s head, the eyes will stay open, like holding up your own eyelids. Also, John literally ran to the bank and saw Farley in the water holding April. That’s how he knew what happened.
You can’t prove climate change isn’t the result of humanity’s presence any more than a scientist can say it is. Again, based on your own argument, we only have the data available since scientists began studying the subject. However, one can take the data collected over the last 100+ years and form a hypothesis as to the causes of those climate changes.
Who was the guy with the mustache that looked like Mike then?