Re: OT:Thanksgiving


"Alistair" <alistair@xxxxxxxxxxxxxxxxxxxxx> wrote in message
news:801d95d7-eb25-40b8-b579-23d9ff881331@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
On 2 Dec, 02:23, "Rick Smith" <ricksm...@xxxxxxx> wrote:
[snip]
I am not certain how that question relates to the obligation,
of those making scientific claims, to establish credible scientific
evidence; but yes, I do smoke and, when I first saw the U.S.
mandated warning on cigarette packages in 1969, I found the
claims to be not credible. Having since examined some of the
scientific evidence, I have found no reason for me to change
my mind. ["Experimental Production of Carcinoma With
Cigarette Tar", Ernest L. Wynder, Evarts A. Graham, and
Adele B. Croniger, June 8, 1953, is presented often as proof
that "smoking causes lung cancer". While the experiment did
find the presence of "carcinogenic factors in cigarette smoke",
it never determined how the cancer developed.]- Hide quoted text -

- Show quoted text -

Perhaps a modern repeat of that experiment with cell lines showing
before and after DNA profiles (highlighting DNA damage caused by the
carinogen) would help you?

H'm, I believe I could help epidemiologists, so, no, in my
opinion, a repeat of the experiment would be of no value
to either of us.

Or pehaps you would need a detailed
analysis of the chemical pathways permitting the carcinogen to enter
the cell and cause said damage?

Unnecessary.

Don't you place any emphasis on the association of a carcinogenic
chemical with a damaged cell?

I would not use the term "carcinogenic chemical" (it implies
the relation "chemical causes cancer") and prefer the term
"carcinogenic factors" (which implies nothing more than an
association that may lead to cancer).

I will say that my emphasis involves the association between
carcinogenic factors in chemicals and damage to cells.

I am tempted to ask whether you would
remove all three forms of asbestos from a building without protective
equipment because the exact mechanism by which asbestos causes lung
cancer has not been proven?

Not that I would be involved in such activities; but, if I
were, I would chose to wear protective clothing because
of the dust and dirt and not because of any fear of
mesothelioma.


.

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