Category Archives: Hearsay

“There is nothing as mysterious as a fact clearly described.” – Garry Winogrand

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“Most horses won’t walk backward voluntarily, because what they can’t see doesn’t exist.” – Terry Pratchett


Cultural Networking

An interesting bit of rapid cultural adaptation by Chinese to social media and smartphones has led to some unique communication shortcuts: 502 = ‘I love you’, 3q = ‘thank you’, 88 = ‘bye-bye’. It should be no surprise that many prefer memorizing numbers to characters or English words.


CORRELATION IS NOT CAUSATION

The cliché “correlation is not causation” has an element of truth to it. Actually, MORE than just an element of truth. Too often we are handed a fait accompli of “scientific proof” that is based on correlative studies, but which has not established a confirmed cause and effect relationship. The following quotes from Ed Tufte (Beautiful Evidence) are relevant to establishing actual requirements:

“Correlation is not causation but it sure is a hint.”

“Empirically observed covariation is a necessary but not sufficient condition for causality.”

“Many true statements are too long to fit on a PP [PowerPoint] slide, but this does not mean we should abbreviate the truth to make words fit. It means we should find a better tool to make presentations.”

“In assessing causal linking lines, the claim that ‘X acts on Y’ should be tested against competing alternatives, such as the paired arrows of interplay. Another check is to reverse the claim: ‘Might it be instead that Y acts on X?’

“Evidence that bears on questions of complexity typically involves multiple forms of discourse.”

“Evidence is evidence, whether words, numbers, images, diagrams, still or moving. It is all information after all.”


“The universe requires everything to be observed, lest it cease to exist.” – Terry Pratchett


“…the mappings are specific, coherent, credible, and testable…. When mappings make explanatory interpretations of images, then serious standards of quality for evaluating an explanation become relevant.” – Ed Tufte


“Blinded by the light. Revved up like a deuce, another runner in the night.” – Bruce Springsteen