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Another difference is that Simpson's "paradox" involves all the subgroups that the full population is partitioned into, unlike Berkson's "paradox".

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I like how you put paradox in quotes. I also annoys me when people call these things paradoxes. They're more properly called counter-intuitive phenomena. I wonder if there's a single-word name for that.

paradox :-)

So I actually checked and... turns out you're right.

According to Wikipedia, "paradox" can either mean "logically self-contradictory statement" or a "statement that runs contrary to one's expectation". I always thought that it meant the former only.

These two concepts should really really have separate words.

You "checked Wikipedia," is that it? You're done now?

You sound like you're trying to make a point. Make a point.

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