GENEALOGY-DNA-L ArchivesArchiver > GENEALOGY-DNA > 2005-01 > 1104706785
Subject: Re: [DNA] MRCA = 800 AD
Date: Sun, 2 Jan 2005 17:59:45 EST
With the greatest of respect, Pavlov was observational evidence that was
then verified by experiment, a rather different situation from a few reports
out of the many thousands of tests now done which seem out of the ordinary.
There could now be 500 "one in a hundred" cases, indeed there should be, with at
least 50,000 tests performed by all the different groups and companies in the
I think it is fair to say that we have "locked horns" on quite a few
occasions in the past. I really don't know if it was ever a case that you were
right (although you were always convinced you were) and I was wrong (as I may
well be on frequent occasions) - perhaps better described as differing
perspectives. I deeply respect your knowledge, however again I must challenge you.
Anecdotal evidence that keeps streaming in cannot and should not be ignored.
My background is psychology and medicine so I can speak on more solid ground
in these domains.
Lets take Ivan Pavlov. He was a Russian physiologist studying digestion in
dogs, collecting samples in little glass viles attached to the dog's salivary
glands. One day he by chance noticed that the dogs salivated at the
footsteps of the feeder / handlers approaching. I would tend to think that the
vast majority of physiologists would have dismissed this as a chance occurrence
and they would have moved on with their experiments. Instead he became
intrigued by this one observation. This led him to do systematic studies
(probably familiar to most here) with a metronome and food powder and so discovered
the principle of association. Eventually the phenomenon he discovered was so
unassailable that it became rather close to a law in physics and is now
termed "classical conditioning". Later we learned that this worked to describe
how humans learned (e.g., phobias); and more recently how the immune system can
be classically conditioned, opening the door to potential new adva!
nces in medicine. All because Pavlov did not ignore what amounted to
anecdotal evidence. Yes indeed, studies will have to confirm any assumptions about
differing mutation rates in different families, but it is a hypothesis
worthy of testing.
Perhaps John, as ever, we will simply have to agree to disagree.
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