Lucille signed a living will when she was 65 years old and in good health. It stated that she wanted no extraordinary medical procedures to be used if doctors determined she would not recover. She was conscious of the ramifications of her decision. At the age of 85 she had a stroke in her brain stem and could no longer breathe for herself or take in food. Doctors determined that she would not recover respiration or digestion. Which of the following would be true in Lucille's case?

Lucille could be given sedatives and pain medications but should not be put on a ventilator or given a feeding tube.

Providing nutrients to Lucille through a feeding tube would be permissible.

Connecting Lucille to a ventilator to help with respiration would be permissible.

Lucille's children could override the living will because it was drawn up 20 years before the stroke occurred.

as university of miami psychologists debra lieberman and adam smith pointed out in a recent article in the journal current directions in psychological science, humans have social and psychological mechanisms to deter incest. with very few exceptions, marriages between brothers and sisters and between parents and their children are verboten in every human culture. the primary psychological anti-incest mechanism is the yuck response. even the idea of sex with their mom or dad, bro or sis is upsetting to most people. the psychologist jonathan haidt has found that nearly everyone is repelled by the prospect of brother-sister sex, even in hypothetical situations in which there is no chance of pregnancy).

the biological cost of incest

this raises an interesting question: just what’s so bad about incest? sure, having sex with your dad or your sister seems gross — but why? some anthropologists have argued that incest taboos are learned social conventions. this explanation, however, doesn’t make sense to me as it does not explain the widespread existence of anti-incest mechanisms in creatures ranging from cockroaches to chimpanzees. second, the incest taboo is about as close to a universal law as human moral rules get.

why should mechanisms to avoid incest be so widespread both in nature and across human societies? the answer is simple. the problem with having sex close with relatives is that there is an astonishingly high chance that your offspring will be born with a serious birth defect.

fir trees are found in areas with cooler climates. fir trees have needles for leaves and remain green year-round.

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