There is No Such Thing as Coincidence

Ah, the mantra of TV homicide detectives & conspiracy theorists.

The Internet Blowhard’s Favorite Phrase
Daniel Engber, 02 Oct 2012
Slate
Why do people love to say that correlation does not imply causation? “The correlation phrase has become so common and so irritating that a minor backlash has now ensued against the rhetoric if not the concept. No, correlation does not imply causation, but it sure as hell provides a hint.” [italics mine]

The public is quick to blame commercial products and services, when harm is done that seems to “correlate” with use of these products and services. Likewise, the companies involved are quick to invoke the phrase “Correlation does not imply causation!” as loudly and widely as possible. Much to the dismay of the injured, there is a wide spectrum of fault, finely distinguished degrees of responsibility. It requires a preponderance of evidence to establish culpability, i.e. a high degree of correlation between the harm and the product or service. Even then, companies will continue to disavow liability, and aggressively defend themselves against any legal action. Hence, personal injury lawyers.

Many people still deny the existence of global warming, in spite of mounting evidence to the contrary. “Correlation does not imply causation!” One wonders what they will think when baked by the sun, or washed away by the rising tide.

From my science background, I know that finding correlation is an important tool in e.g. theory confirmation. However, the article is arguably correct, that we now have too many correlations from which to choose. Invocation of the phrase can be considered "a tiny fist raised in protest against Big Data”.