Principles of Clarity Used by Great Communicators

What is this page about?

An explainer of the principles of clarity used by great communicators, opening with Orwell's 1946 rules and arguing clarity is a cognitive achievement, not a stylistic preference, and is not the same as simplicity. It presents five structural principles (explicit structure, dependency-aware sequencing, constraint preservation, relevance signaling, and shared reference grounding), a reconstruction test for clarity, why clarity is sometimes resisted, and the link between clarity and trust, synthesizing classical rhetoric with modern cognitive science.

What has been corrected on this page?

Every accepted correction to this page is recorded with the exact change, so readers can see how the page improved over time.

1. 5 August 2026 · corrected by Emir Baycan

   A second review of this article, following an earlier correction that addressed a Thomas Jefferson quotation, found several research claims that appear invented or substantially overstated. The page described a 1978 Kintsch and van Dijk study in which readers of structurally clear texts showed '35-40% better recall at one week'; the cited paper is a theoretical and computational model of text comprehension, not a delayed-recall experiment, and the bibliography listed their 1983 book rather than the 1978 paper described. It reported a randomized plain-language trial of a Veterans Administration benefits letter with 500 recipients producing 40 percent more correct applications and 60 percent fewer follow-up calls, and an SEC test of plain-English prospectuses with 600 investors yielding a 27-percentage-point comprehension gain, neither of which could be located in the cited or official sources, with no SEC source in the bibliography at all. It quantified Sweller and Cooper's worked-example result as '30% less time' on transfer problems, omitting that the advantage was less clear for structurally different problems. It called the Simons and Chabris inattentional-blindness experiment 'the neural basis' for a principle, presented an unsourced Jeff Bezos quotation as verbatim, claimed a 2010 Wikipedia redesign that does not appear to have occurred, and stated that Thiokol engineers 'failed to state their conclusion explicitly' before the Challenger launch when they had in fact recommended against launching. The article also ran two different and conflicting five-principle frameworks, one in its summary table and another in its section headings, with a third list in the FAQ.

   What the page claimed

   The article stated that 'A 1978 study published in Psychological Review tested these predictions against reader behavior: subjects given structurally clear texts showed 35-40% better recall at one week than subjects given scrambled or poorly connected versions of the same content.' It described a plain-language field experiment in which two versions of a Veterans Administration benefits letter were tested with '500 recipients randomly assigned', reporting 'a 40% higher rate of correctly completed benefit applications and a 60% reduction in follow-up telephone inquiries', published in 'a 2011 government report'. It stated that the SEC 'tested comprehension of plain-English prospectuses against original versions with 600 investors' and that 'Comprehension of key terms and conditions improved by an average of 27 percentage points', with investors identifying risk factors 'at twice the rate'. It said learners given worked examples 'solved subsequent transfer problems in 30% less time', replicated across 'mathematics, science, chess, and writing instruction'. It called the Simons and Chabris experiment 'the neural basis for Principle 4'. It said Thiokol engineers 'failed to state their conclusion explicitly at the outset' and that Tufte concluded the data 'unambiguously supported' postponement. It quoted Bezos as saying 'The clarity of a good memo forces the author to construct a coherent argument' without a source, said Amazon 'banned PowerPoint', claimed 'When Wikipedia redesigned its article structure around 2010', called reconstruction 'the most reliable test' of clarity, and asserted receivers 'must process everything at equal priority'. Its summary table listed the principles as explicit structure, dependency-aware sequencing, concrete grounding, calibrated detail and feedback orientation, while its sections were explicit structure, dependency-aware sequencing, constraint preservation, relevance signaling and shared reference grounding, and the FAQ listed a third set.

   What was corrected

   The Kintsch and van Dijk passage now describes their 1978 work accurately as an influential model of how readers build coherent mental representations from propositions and discourse structure, and the bibliography cites the 1978 Psychological Review paper directly rather than the 1983 book. The VA and SEC experiments were removed entirely and replaced with the documented policy record: the federal plain-language programme and Plain Writing Act of 2010, and the SEC's 1998 adoption of plain-English requirements for prospectus cover pages, summaries and risk factors, with an explicit statement that no controlled comprehension percentages are being claimed. The Sweller and Cooper description now reports less instructional time and faster, less error-prone performance on structurally similar problems, notes the advantage was less clear for structurally different problems, and adds the expertise-reversal finding with a Kalyuga et al. 2001 citation. The invisible-gorilla passage is now framed as an analogy and 'neural basis' is gone. The Challenger section states that Thiokol engineers recommended against launching below 53F and were overruled, that Tufte's chart analysis has itself been debated, and that presentation was one contributor within a wider failure involving management pressure, normalisation of prior anomalies, data uncertainty and organizational authority. The unsourced Bezos quotation, the PowerPoint ban claim and the 2010 Wikipedia redesign were removed, the latter replaced with the current Manual of Style lead-section requirement. The checklist passage now describes the actual components of the WHO Surgical Safety Checklist instead of retrofitting it to the article's own model. One five-principle framework, lead with purpose and main point, sequence prerequisite ideas, ground abstractions concretely, preserve important conditions and verify understanding, is now used identically in the table, the section headings and the FAQ, and is labeled a WhenNotesFly synthesis; 'communicative generosity' is labeled editorial terminology. Exceptions were added for conclusion-first and principle-before-example sequencing, superlatives and universal attention claims were softened, unused references were replaced with claim-level sources, and length went from about 3,630 to about 2,600 words.

   Why: A claim-level review found three quantified research results that could not be traced to the cited or official sources, one of them attached to a real paper that contains no such experiment, plus a behavioural psychology study described as a neural finding and a case study whose central assertion reversed the documented history. The article also ran three different versions of its own five-principle framework in the table, the section headings and the FAQ, which is a substantive defect in a page about clarity. Corrections remove the unverifiable statistics, bound each retained finding to what its source establishes, correct the Challenger and Wikipedia accounts, and unify the framework so the page follows the advice it gives.

   View the full record →
2. 11 July 2026 · corrected by Emir Baycan

   Quote has no verified source in Jefferson's writings; mark as attributed rather than asserting authorship.

   Before

   when one will do." - Thomas Jefferson

   After

   when one will do." - attributed to Thomas Jefferson

   Why: This quote has no verified source in Jefferson's writings; marked as attributed rather than asserting authorship. Verified the live article body already reflects the attributed framing. The faq field does not mention Jefferson or this quote at all, so no secondary fix was needed there.

   View the full record →

Who checked this page?

1 contributor has checked "Principles of Clarity Used by Great Communicators" on When Notes Fly. Each name below links to that person's public CitePep profile, where every contribution they have made is listed with the exact change they proposed.