An abbreviation of the Latin phrase "quod erat demonstrandum". It literally translates as "which was to be demonstrated", and is a formal way of ending a mathematical, logical or physical proof. It's purpose is to alert the reader that the immediately previous statement, which naturally was arrived at by an unbroken chain of logic, was the original statement that we were trying to prove.
"I refuse to prove that I exist," says God, "for proof denies faith, and without faith I am nothing."
"But," say Man, "the Babel fish is a dead giveaway, isn't it? It could not have evolved by chance. It proves you exist, and so therefore, by your own arguments, you don't. QED."
"Oh dear," says God, "I hadn't thought of that" and promply vanishes in a puff of logic." -- Douglas Adams, from "A Hitchiker's Guide to the Galaxy"
Proof that x + 3 = 0 if x = -3
x + 3 = (-3) + 3
= 0
QED
"But," say Man, "the Babel fish is a dead giveaway, isn't it? It could not have evolved by chance. It proves you exist, and so therefore, by your own arguments, you don't. QED."
"Oh dear," says God, "I hadn't thought of that" and promply vanishes in a puff of logic." -- Douglas Adams, from "A Hitchiker's Guide to the Galaxy"
Proof that x + 3 = 0 if x = -3
x + 3 = (-3) + 3
= 0
QED
by redwind64 February 17, 2005
Get the QED mug.qeadzcwrsfxvetdgcbryfhvntugjbmyihkn,uojlm.ipl'. is boredom.
by xX69Ethan69Xx March 31, 2019
Get the qeadzcwrsfxvetdgcbryfhvntugjbmyihkn,uojlm.ipl'. mug.Related Words
by Bluemanar88 December 11, 2019
Get the 13579-qetuo[\adgjl'zcbm. mug.when qwertyuiopoasdfghjklzxcvbnm (normal or reversed) and plmoknijbuhvygctfxrdzeswaq(normal or reversed) made you bored so you skip a letter each time you type the keyboard
by randompfp February 12, 2021
Get the qetuoadgjlzcbm mug.qetuopiyrwadgjlkhfszcbmnvx
by qwertyasdfghuiopjkl April 19, 2021
Get the qetuopiyrwadgjlkhfszcbmnvx mug.I'm so bored I'm gonna type qewrtuyiospadgfhjlkzxvcbnm into urban dictionary and hope no one has beaten me to it
by the boredom master 2166 June 12, 2020
Get the qewrtuyiospadgfhjlkzxvcbnm mug.