New proof: piracy correlates to global warming (pic)
pizdaus.com
pizdaus.com
However beware of confusing correlation with cause-effect relation. We don't know which one could be the cause of the other or there could be a hidden common cause. For instance, if weather is good, people go outside and don't do piracy. If weather is bad, people stay at home and look for entertainment. These are just examples.
A funny story is the one with the London taxi drivers. A survey has pointed out a positive and significant correlation between the number of accidents and wearing coats. It was assumed that coats could hinder movements of drivers and be the cause of accident. A new law was prepared to prohibit drivers to wear coats when driving.
Finally another study pointed out that people wear coats when it rains! Rain was the hidden factor common to wearing coat and accident frequency.
Some (bad) scientist is experimenting with a frog put on a table. He suddenly screams "jump" while hitting the table with both hands. The frog of course jumps, scared away. The scientist then cuts one leg away and repeats the experiment. The frog still jumps away but of course with less agility. The scientist cuts another leg away and repeats the experience. The frog still manage to jump in someway. Until the scientist has cut all the legs away. At that point, the frog doesn't jump when he scream "jump!". Even if repeated.
The scientist then writes in his log book: "when all the frog legs are cut away, the frog becomes deaf."
(The image about halfway down) http://www.venganza.org/about/open-letter/