Up to a point, but either Elvis is dead or he isn't.
There's an incredibly large pile of data on the association between passive smoking and sickness. We either need to establish convincingly that it's all wrong, because stuff using better methodology trumps it, or we provisionally assume it's true.
That's science.
Science... Herein lies a Problem.
A pile of data Doesn’t establish the Truth. It doesn’t even establish Fact. It’s just a pile of Data.
There are Many ways to Assimilate Data. Some are Better than others if a Reflective Interpretation of the Results of Data is going to be applied to some Hypothesis.
There is also many times when Biases can be associated with the Collection of Data. Biases to yield a result to Satisfy a Cause/Agenda or a Funder.
If one bases a Belief or Position on Statistical Results, shouldn't one Question just how Accurate these results really are?
Because a Statistical Result used to make an Inference about a True Population is Only as good as the Method to which it was derived. And the Statistical Method is Only as good as the Data that was used. And the Data is Only as Good as the way it was collected.
Prue Talbot has generated a Pile of Data. Should we consider her work to be Relevant and Accurate? What she does is "Science". It is up to Reader of her work to make the decision whether it is Good Science or Bad Science.
Black and White concepts like Elvis being dead or not may be relatively easy to discern for Most people. But concepts like Risk or Harm or Safety are not so Universally Acceptable. And they are Very Difficult to Quantify using Numbers.
If 1 person out of 10 gets Cancer from using a Product, do YOU consider the Product to be Safe? How about 1 out of 1,000? Or 10,000? Or 100,000? Where do you Draw the Safety Line? And how do you know a Product causes this Cancer? A Study that has all the Potential Biases and built in chances of Error?
Here is the Perspective thing…
If you say something is Safe (or a Hazard) if it causes 1 out of 10,000 to get Cancer and I say that it should be 1 in 100,000, who is Right? Or maybe we are Both Right to ourselves? Or maybe Both Wrong to a Third Person.
This entire “Does Nicotine Cause Cancer” debate is great. And it has been going on since Day One. I just don’t think a Pile of Data makes a Very Convincing Argument either For or Against.
In My field, One Good Paper out Trumps 100 Bad Papers.
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Just a Side Note:
Some researcher believe that Nicotine does Not cause the onset of certain types of Cancer. That these cancers occur naturally in the Human Population. But that the presence of Nicotine in the Blood Stream helps to promote Growth of these Cancers once they form. And Inhibits the body’s ability to Fight Off these Cancers. So in this case, whereas the Nicotine was Not the cause of the Cancer, it caused Harm by assisting in Cancer Growth.
If these researchers are correct, it puts a whole New Spin on the entire "Is Nicotine Safe" concept.