We publish our audit record because accuracy claims should be checkable. Every entry on this site runs through an automated fact-audit pipeline (accuracy audit → source-grounded repair → visual QA); this page is generated from that pipeline's own report, not written by hand.
Last full accuracy audit: 2026-09-08 · 24 entries checked · 16 flagged · 35 issues confirmed · 16 corrected · 19 still open
Paper cup — The claim that paper cups were known in imperial China as 'chih pei' and used for serving tea is not supported by widely-known historical canon; there is no credible evidence of disposable paper cups in ancient China, and the term 'chih pei' appears to be inve
Paper cup — The claim that textual evidence appears in a description of the possessions of the Yu family from Hangzhou is not a verifiable fact from established historical records; no such specific reference is recognized in mainstream scholarship.
Plate (dishware) — The claim that disposable plates were invented in 1904 is incorrect; paper plates were patented earlier, in 1867 by John Allen, and disposable plates existed in various forms before 1904.
Plate (dishware) — The claim that the first limited-edition collector's plate was 'Behind the Frozen Window' produced by Bing & Grøndahl in 1895 is incorrect; the first limited-edition collector's plate is widely recognized as 'Behind the Frozen Window' (or 'Beyond the Frozen Wi
Recliner — The statement that Daniel F. Caldemeyer's recliner was used by NASA for Projects Mercury, Gemini, and Apollo is false. NASA used specialized couches (not recliners) designed by other engineers, and Caldemeyer's patent was not used for those programs.
Recliner — The claim that the Secret Service purchased 50 of Caldemeyer's chairs for President Lyndon B. Johnson as a Christmas gift is unverified and likely fabricated; no credible evidence supports this.
Rocking chair — Wicker rocking chair production in America peaked in the late 19th and early 20th centuries, not the middle of the 18th century.
Rocking chair — Peter Cooper is not known for designing the first steel rocking chair; that attribution is not a widely established fact in furniture history.
Salt and pepper shakers — The claim that John Landis Mason invented small, plain glass screw cap containers for salt and pepper shakers is not supported by established canon; Mason invented the Mason jar for canning, not specifically for salt and pepper shakers.
Salt and pepper shakers — The statement that early cruet-stands included three shakers with the third for ground mustard is speculative and not a confirmed historical fact; the purpose of the third shaker is debated and not definitively established as ground mustard.
Shower — The claim 'The first shower in a public bathhouse was in 1887 in Vienna' is factually incorrect; the first communal showers in a public bathhouse were introduced by François Merry Delabost in the 1870s for the French army.
Sofa bed — The entry states that Rudolf Coopersmith patented the sofa bed in 1925 as the precursor of the modern pullout sofa, but the widely known history credits Bernard Castro's 1931 'Castro Convertible' as the direct precursor.
Sofa bed — The entry claims that William Brouwer developed the first sofa convertible frame style in the U.S., which is not a widely recognized or established fact in standard furniture history with no verifiable source.
Spoon — The entry states that the expression 'born with a silver spoon in his mouth' originated from the medieval custom of gifting a baptismal spoon to a child, but this origin is unsubstantiated and not widely accepted as fact.
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