nerzhin comments on Undiscriminating Skepticism - Less Wrong
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I think there is a more salient difference, which is that it's not the embryo that will be conscious in ~20 weeks, whereas it is the brain.
By all means continue, I always enjoy parsing these things. My friends are so sick of hearing about trolley cases they'd throw themselves on the tracks.
I don't understand this. What specifically is the important difference between embryo (now) and non-embryo (in 20 weeks)? Conciousness? Memories? Physical structure? How is it that they are different things, while brain (now) and brain (future) are the same thing?
Consciousness. Basically, I want to know if there is a reflective "experiencer" there to care about. If not, I don't give the thing moral standing.
Your cryonically frozen brain presents an odd situation, because the experiencer is sort of "paused." But I think it's still clear that in killing that brain you're ending somebody's (conscious) life prematurely.
I like this discussion for its own sake, but I am curious: do you disagree with something I've said? Or are we just monkeying with scenarios for the sheer hell of it? (Not that that is in any way a bad thing - they are lots of fun.)
If I understand you correctly, you are arguing that the suspended brain is concious (just "paused", as you say). So there is some property of a system that we can call "concious" even if it's asleep, suspended, etc., and that embryos (before 20 weeks or so) lack this property.
If this a fair statement, I don't have anything more to say. The infants, animals etc. stuff is being covered in the "infanticide" sub-thread on this page.
Mostly we're monkeying with scenarios for the fun of it. I have somewhat less certainty than you about embryonic stem cell research - I estimate some chance that it is morally problematic.