View source for Q. E. D.

{{also|QED}}
==English==

===Phrase===
{{head|en|phrase|head=[[Q]]. [[E]]. [[D]].}}

# {{alternative form of|en|Q.E.D.|t=''initialism of'' '''[[quod erat demonstrandum]]'''}}
#* {{RQ:Sterne Tristram Shandy|volume=II|chapter=XIX|page=168|passage=If death, ſaid my father, reaſoning with himſelf, is nothing but the ſeparation of the ſoul from the body;—and if it is true that people can walk about and do their buſineſs without brains,—then certes the ſoul does not inhabit there. '''Q. E. D.'''}}
#* {{quote-book|en|author=w:Benjamin Donn|chapter=An Essay on Plane Geometry|title=The Geometrician: Containing Essays on Plane Geometry, and Trigonometry:{{nb...|With the Application to the Solutions of a Variety of Problems, with are of Great Use in Measuring Heights and Distances of Places, Surveying of Counties, Sea-coasts, &c.}}|edition=2nd|location=London|publisher=Sold by [[w:Joseph Johnson (publisher)|J[oseph] Johnson]],{{nb...|in St. Paul’s Church-Yard.}}|year=1775|section=book I (The Introduction), paragraph 59|page=10|pageurl=https://books.google.com/books?id=gKk2AAAAMAAJ&pg=RA1-PA10|oclc=23635601|passage={{smallcaps|Theorem 2}}. ''The Angles'' <math>B</math>, <math>C</math>, ''at the Baſe of an Iſoceles Triangle'' <math>ABC</math>'', are equal to each other; and a Line'' <math>AD</math> ''biſecting the Angle'' <math>BAC</math>, ''divides the Baſe into two equal Parts, and is perpendicular thereto.'' For becauſe the Line <math>AD</math> biſects the <math>\angle A</math>, that is, makes the <math>\angle BAD = \angle CAD</math>, and Side <math>AB</math> is <math>= AC</math>, and <math>AD</math> common to both, the <math>\triangle ABD = \triangle ACD</math>; <math>\angle B = \angle C</math>, and <math>\angle ADB = \angle ADC</math>; <math>\because AD \perp</math> to <math>BC</math>. '''Q. E. D.'''}}
#* {{RQ:Scott Tales of My Landlord 2|volume=IV|chapter=VI|page=120|passage=''Ergo'', Reuben Butler might take possession of the parish of Knocktarlitie, without forfeiting his friendship or favour—'''Q. E. D.'''}}
#* {{quote-book|en|author=w:Daniel Waterland|chapter=A Second Defence of Some Queries Relating to Dr. Clarke’s Scheme of the Holy Trinity: In Answer to the Country Clergyman’s Reply|title=The Works of the Rev. Daniel Waterland, D.D.{{nb...|formerly Master of Magdalene College, Cambridge, Canon of Windsor, and Archdeacon of Middlesex; now First Collected and Arranged. To which is Prefixed, A Review of the Authors Life and Writings, by William van Mildert, D.D. Lord Bishop of Llandaff.}}|location=Oxford, Oxfordshire|publisher=At the [[w:Oxford University Press|Clarendon Press]]|year=1823|volume=III|section=query III|page=165|pageurl=https://books.google.com/books?id=D4YNAAAAQAAJ&pg=PA165|oclc=957692334|passage=[I]f the Son [of God] be in ''nature'' equal to the Father, he is also equal in ''Godhead'', which is a word expressing ''nature''; and if equal in ''Godhead'', equally God ''supreme''. '''Q. E. D.'''}}

===Noun===
{{en-noun|?|head=[[Q]]. [[E]]. [[D]].}}

# {{alternative form of|en|Q.E.D.|t=some [[fact]] or [[scenario]] that [[prove]]s an [[argument]] or [[proposition]]}}
#* {{quote-journal|en|author=G. D. Yeats|title=Account of Ann Fooks’s Case of Ischuria and Vomiting of Urine|editors=Samuel Fothergill; John Want|journal=The Medical and Physical Journal|location=London|publisher=Published for the proprietors, by J. Adlard,{{nb...|23, Bartholomew-Close, and 39, Duke-Street, Smithfield}}; and sold by J. Souter,{{nb...|No. 1, Paternoster-Row.}}|month=February|year=1814|volume=XXXI, part 2|issue=180|page=122|pageurl=https://books.google.com/books?id=HRAUAAAAQAAJ&pg=PA122|oclc=1051228262|passage=This was exactly the '''Q. E. D.''' of the paper.}}
#* {{quote-book|en|author=[[w:William Magee (archbishop of Dublin)|William Magee]]|chapter=Supplement to the Remarks on the Unitarian Version of the New Testament|title=Discourses and Dissertations on the Scriptural Doctrines of Atonement & Sacrifice;{{nb...|and on the Principal Arguments Advanced, and the Mode of Reasoning Employed, by the Opponents of Those Doctrines as Held by the Established Church: With an Appendix, Containing Some Strictures on Mr. Belsham’s Account of the Unitarian Scheme in His Review of Mr. Wilberforce’s Treatise: Together with Remarks on the Version of the New Testament lately Published by the Unitarians.}}|location=Philadelphia, Pa.|publisher=S. Potter & Co.{{nb...|No. 115, Chestnut Street.}}; Jesper Harding, printer|year=1825|volume=II|section=footnote|page=266|pageurl=https://books.google.com/books?id=moEtAAAAYAAJ&pg=PA266|oclc=191255594|passage=The Unitarian might therefore here easily produce his '''Q. E. D.''' for the exclusion of all but the maintainers of Christ's proper humanity from the pale of Christianity.}}
#* {{quote-book|en|author=“Anglicanus” [pseudonym]|chapter=Letter III|title=View of the Character, Position, and Prospects, of the Edinburgh Bible Society. In Seven Letters|location=Edinburgh|publisher=Printed for Brown & Wardlaw,{{nb...|16 St Andrew Street}}; and sold by M. Ogle,{{nb...|W. Collins, and Wardlaw & Co. Glasgow; and James Duncan, J. Hatchard & Son, and B. J. Holdsworth, London.}}|year=1827|page=24|pageurl=https://books.google.com/books?id=VN4HAAAAQAAJ&pg=PA24|oclc=1062258796|passage=Whoever starts a doubt as to the validity of any of those allegations to which he has set his '''Q. E. D.''' is indicted as a disturber of the peace.}}

===Anagrams===
* {{anagrams|en|a=deq|DEQ}}