No need for agonised puzzlement. It's simple. Lanza was a psychopath. Many are. Difference is, he lived in a culture that glorifies guns.
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@dibblego@andrew_jackman@richarddawkins Genuine question: how do studies linking smoking with cancer do other than measure correlation?
@lancewalton @andrew_jackman @RichardDawkins there is a control group and there is repeatability. Both are important to experiment design.
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@dibblego@andrew_jackman@richarddawkins But all that shows is that there is a correlation between smoking and cancer. How about cause? -
@lancewalton@andrew_jackman@RichardDawkins this is true, which is why repeatability is critical. - Show replies
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@dibblego@andrew_jackman@richarddawkins We assume that all other confounding factors are averaged out between groups ... 1/2Thanks. Twitter will use this to make your timeline better. UndoUndo
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@dibblego@andrew_jackman@richarddawkins that cancer isn't caused by some other habit that smokers are given to?Thanks. Twitter will use this to make your timeline better. UndoUndo
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