James R said:
...Sentient means "consciously perceiving". That requires an ability to perceive (especially pain) and the consciousness to recognise that perception as applicable to a self.....
You are on a very slippery slope if you are saying it is ok to kill for some useful (to humans) reason creatures that are not "consciously perceiving."
First problem is: How do you know which are "consciously perceiving"? - This well know problem in psychology and philosophy is usually called the "other minds" problem. In essence you can only be sure that you yourself are "consciously perceiving." I may be just a commuter, as you have never seen me, but that is not what I am referring to.
I am refering to the fact that your wife (assume you have one, if you do not) may not be "consciously perceiving." I.e. she may be what is called a "zombie" in psychology and philosophy circles. - An unconscious biological creature that behaves like a conscious one in everyway. For example, if burning cigarette is pressed against the zombie's skin it screams, tries to get free, etc. but actually has no pain or any other "mental state" (to again use the jargon of psychology and philosophy.)
This "other minds" problem is rather academic for most other humans, but does come up from time to time. For example, is there any reason (other than the politics) to keep Israel's ex president alive in his complete and deep coma?
Once you start down to the "lesser creatures" assumed to be "consciously perceiving," such as your dog, where do you stop? How about a shark, of a squid, or a catfish or a bird, including chickens? etc.
I hope you know that one does not breath to get oxygen, that is just a fortunate consequence. One breaths to rid the blood of the CO2 that is building up in it. Proof in next paragraph.
I have posted elsewhere that two men working on an APL satellite inside a large bell jar had forgotten to turn off the dry N2 supply and were lazy, so they only hand cranked the massive steel bell jar up enough to crawl between its bottom lip and the base plate. When time for their car pool came, both were found dead inside. - They could have left at any time, but as the were keeping the blood CO2 low (until they died) they felt no urge to breath any “air” other than the basically pure N2 they were breathing.
Thus I wonder, would you object if while you are sleeping in your bed I bath your face in body temperature slow stream of pure N2? - Silly question - of course you would not, because you would be dead, and no "consciously perceiving" James R would have been killed. Thus, your wife, if she agrees with you that it is OK to kill the "non-consciously perceiving" could not object either. The "benefit" to some humans that justifies N2 gassing JR may be limited, (MacM might benefit
) but you were doomed to die someday, why not tonight? (Spare MacM years of agony).
I of course know you could be come conscious the next morning and that is your excuse for not giving your OK to a N2 "face bath" tonight, but this all reminds me of a Woodie Allen joke: He said: "I am not afraid of death. I just don't want to be there when it happens." Sure you do not want to take his advise?
Perhaps you can just respond to the "How do you know which are "consciously perceiving?" question. You are always big on "operational definitions" etc. without which we are just dealing in nonsense or philosophy (assuming there is a difference.
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