Yep. Placing a premium on that leap is an arbitrary value judgment.
The difference between animals and humans is obvious. Nothing arbitrary in the least. Evidence that the destination was reached is evident. You don't need to explain how it happened to know that it did happen.
barbalith said:
We don't actually need the bold bits to survive and the rest is commonly found in the animal kingdom. At any rate this is a red herring, because these things are only important if we put a premium on survival and there's no rational reason to do this if we don't arbitrarily assign a value to survival.
It doesn't matter that these things are found in the animal kingdom. What matters is how humans accomplish these things, as opposed to how animals do it. Animals use instinct. Humans use reason.
(And seriously, untreated injuries? Infection, gangrene, death. No shelter? You live where, California? I live in Maine. I invite you to live outside anywhere east of the Rockies and north of Mason-Dixon between December and March. Naked.
And who needs language to survive? Anyone who wants a thought in their head. Communication is secondary, but it helps when there's more than one of you. Still, try making it on a tropical desert island without even the most basic code of symbols to think with. I won't be putting any money on that bet.)
And no, it's not arbitrary to put a value on survival. Life is what makes valuing possible, and necessary. Entities that face no fundamental alternatives have no need for values. Rocks do not value, nor do stars, nor does dust. An immortal would have no need for values because no matter what, it's existence is guaranteed. Mortals do require values, and it is because they will cease to exist if the requirements of their survival are not met. Mortal entities face a constant fundamental alternative: existence vs. non-existence. If they are to exist, they need to value survival. The dead do not.
No survival, no valuing.
If you don't see the factual basis by which a distinction between the living and the dead can be made, then I have to conclude that your existence is an arbitrary construct, and that I'm having this conversation with myself.
barbelith said:
Actually this is what shows up the argument as rather empty, because humanity existed for several thousands years prior to the Industrial Revolution. And this is ultimately another red herring, because nobody is claiming that reason is anything other than a wonderful thing with respect to making it easier for us to survive.
Humans living in irrational eras by the grace of inertia. They lived by what they looted from those they killed, or those who their masters killed. What existed to be looted was the product of thinking minds, without which they would have had nothing. They lived in a state of bare subsistence, and their lives--brutally short--generally were not worth living. Why do you think faith in an afterlife was so attractive?
Remove the fruits of reason from human existence, and we'd all be dead in a week. Remove the freedom to produce, trade and use those fruits as our own happiness demands, and short of a commitment to total religious fanaticism, we'll wish we were dead in a week.