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The question is still clearly out there, and there are reasons to believe both sides: that there’s some kind of systematic error that both are subject to or that the question’s still out.

“There was a systematic error that was found in terms of the overstatement for Democratic support across the board,” said Josh Clinton, a Vanderbilt University political science professor who chaired the 19-member task force.

“I much prefer human error than systematic error,” Jones said, urging that the setup “be revised.”

Human fallibility aside, Schlenoff and Schwartz mention several sources of scientific error, but they do not mention the potential for systematic error deriving from scientific methodology itself.

So did a systematic error emerge when Clinton was viewed as the likely winner over Trump in 2016?