| | Daniel, you've gone too far into history for my tastes. I don't really care how we got to this point, only that we did. It's irrelevant to our own survival that our biological ancestors might have had tails, or claws, or gills, or anything else. You can use evolution to try to understand how we became this way, and that might give you insights into what exactly we are, but our current identity is what really matters.
Now you're looking for big differences between us and animals. That's fine, but why dismiss our similarities with animals? Pleasure/pain mechanisms, although they don't control our behavior as much as they would a non-volitional animal, still play a part in our lives. By looking for only the parts that are different, I think you're ignoring important elements. They're not everything, but they're not nothing either.
By focusing on the fact that we have language skills they don't, you make it sound like we live in order to argue! Agreed that some people here seem to, but that's certainly not universal. Our conceptual minds are tools for survival, not the justification for it.
So going back to life, forget about the evolutionary stuff. None of us live in the jungle, fighting lions and tigers and bears (oh my!) for survival. If we had to, we'd make a gun. That IS how we live. If we had a strong sense of smell like a dog, we'd probably use it. We use the senses we do have, and we make the most of them by using reason to understand them. Animals use their senses, and they have some ability to think and learn, but their minds come nowhere near our own. If they know something is poison, they simply stay away from it. Humans, on the other hand, will mass produce it and use it in factories to make computer chips, medicine, etc. That's the big difference. We rely heavily on our minds, and are able to do things with our minds that animals can't.
The recent point we're addressing here is whether being rational takes a leap of faith, or if it's justified. My answer is that it's justified because it is conducive to life. That animals use some level of thinking doesn't invalidate it, it confirms it. We can't live by reacting to outside stimulus. We have to try to understand to, to integrate it, to make sense of it, and to determine a course of action. That we have vastly superior minds than animals doesn't make that less so. In fact, it makes it more so. Instead of living on a subsistence level, fighting each other for scraps of food, we walk among skyscrapers. We build computers that complete mathematical functions in less than a millionth of a second, with parts that are too small to see with the human eye. We fly from one end of the world to another in big chunks of metal. We literally live by using our minds. Our lives revolve around are ability to reason. And to the extent we are rational, we live successfully.
Now quick short criticism of your tribal irrationality. The initial irrationality is in not protecting rights. They effectively made using your reason a liability in some ares of their lives. The results were that they lived primitive, often barbaric lives, with high mortality rates, short life spans, and limited understanding of the world around them. But even then it never made sense to be irrational. Under those irrational situations, it might make sense to keep quiet, but it never makes sense to actually suspend your thinking. If the tribe thinks that the gods will provide when you hunt, it doesn't benefit you to accept it. It benefits you to ignore it, and to master the art of hunting so you'll have food. You gain nothing from actually being irrational.
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