Originally posted by Symmetric Chaos
But following that line of logic breaking a rock is akin to murder which I doubt you would agree with. Which would be why "thought" is relevant to deciding if something is human.
I don't know...
"thought" is certainly something all animals display, and considering it is an ambiguous term, could be applied to any number of things. Over stretches of time, the "behaviour" of plants, in response to the stimuli in their environment, shows "intelligence". Plants will move toward food sources, compete for mates, etc.
The ability of something to subjectively experience pain or pleasure in anthropic terms might be a measure of morality, but "thought", is certainly not a quality of humans, at least not in any way that allows it to demarcate us from the rest of nature.
with regards to rock murder, murder isn't the act of attacking something, but rather violating the right to life of another person. The onus would be proving that the rock had an inalienable right to life, or that it was ever alive in the first place.
Thought, to me, is very much like the plant behaviour I described above, just with billions more variables interacting so that the "intelligence" doesn't seem like a passive "growth" toward the sun or what not, but as an active adaptation. Really, its only timescale.