
Originally Posted by
Bree Fletcher
Without even touching the rest, though I'm sure what I'm about to say can apply reasonably well toward it as well...
I'd like to draw your attention to an interesting lurking variable: The capability of the human race to diagnose cancer. Thirty or forty years ago, a large number of cases of cancer would not have been detected that we now possess the capability to find.
It's like if I were to stumble around in the woods at night looking for bears. I probably won't find any, except for maybe, if I'm lucky, one that was as oblivious as I. But say I go back sometime later with considerably more care, knowledge, and possibly a flashlight. Suddenly, I might spot a dozen in a single night. Does this mean anything changed to make more bears since the last time I was there?
I'm not saying that I know that cancer rates are the same today as they used to be. What I'm saying is we can't know. Any statistics you may be finding are, unfortunately, inherently flawed, and there's nothing we can do to improve their quality.
So please, do a little source analysis before making any claims.
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