I watched the excellent documentary "The Cove" a few weeks ago, and I highly recommend watching it. Though the film did fill me with dread and outrage (as intended), ironically, the portrayal of the brutal slaughter of dolphins by Japanese fishermen convinced me that dolphins are not nearly as smart as many people would like to convince us of.

Here's why: Imagine there were one particular mountain valley tucked away in some corner of the world, and while human beings could range all over the vastness of this earth unharmed, if they ventured into that valley they would be killed. In that valley there was a race of essentially invincible beings that would herd any wayward human beings into a side canyon and spear them to death.

How would the human race react to that? Let's assume that mounting a military attack and killing the invincible beings weren't possible. Well, first of all, we'd put up signs and fences and maybe even sentries to warn people not to go into that valley. We'd tell our children about the danger, and pass the knowledge of the invincible murderous monsters on, generation to generation. If people did go in there and got killed we'd cover the event in detail on TV, as a warning to others (like Shark Week). Even really stupid people would know not to go into the "valley of the stabby monsters."

Well, if Dolphins are so smart, and they have such good communication and advanced social structure, then why haven't the many dolphins that have personally witnessed the slaughter at "The Cove" and escaped (the movie shows dolphins escaping) managed to warn other dolphins not to go there?

Honestly, if dolphins were anywhere near as smart as humans and were anywhere near as ruthless, they not only would have prevented the slaughter, but would have mounted a commando raid wherein expert jumping dolphins would have trained to jump out of the water, knock the fishermen out of their little boats, then beaten and dragged them down into the cove until they were drowned. And I'm being serious about this. Human beings wouldn't put up with that shit.

Other observed dolphin behavior, such as dolphins killing each other and attacking sharks to defend swimming humans does prove that they have the wherewithal to act in both self-preservation, and in the defense of others, even to violence. But they still get speared in the cove. That tells me they're not that smart.