“If you find you are not understanding my explaination for a joke, hit "F5" on your browser and the page will refresh and I will explain it again.”
Jokes Explained page http://www.insaneabode.com/roboterotica/jokesexplained/index.html
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Ryan North 14
Canadian webcomic writer and programmer 1980Related quotes
“You do not really understand something unless you can explain it to your grandmother.”
variant: If you can't explain something to a six-year-old, you really don't understand it yourself.
variant: If you can't explain it simply, you don't understand it well enough.
Frequently attributed to Richard Feynman
Probably based on a similar quote about explaining physics to a "barmaid" by Ernest Rutherford
Page 418 of Einstein: His Life and Times (1972) by Ronald W. Clark says that Louis de Broglie did attribute a similar statement to Einstein:
: To de Broglie, Einstein revealed an instinctive reason for his inability to accept the purely statistical interpretation of wave mechanics. It was a reason which linked him with Rutherford, who used to state that "it should be possible to explain the laws of physics to a barmaid." Einstein, having a final discussion with de Broglie on the platform of the Gare du Nord in Paris, whence they had traveled from Brussels to attend the Fresnel centenary celebrations, said "that all physical theories, their mathematical expressions apart ought to lend themselves to so simple a description 'that even a child could understand them.' "
The de Broglie quote is from his 1962 book New Perspectives in Physics, p. 184 http://books.google.com/books?id=xY45AAAAMAAJ&q=%22mathematical+expression+apart%22#search_anchor.
Cf. this quote from David Hilbert's talk Mathematical Problems given in 1900 before the International Congress of Mathematicians:
: "A mathematical theory is not to be considered complete until you have made it so clear that you can explain it to the first man whom you meet on the street."
Cf. this quote from Kurt Vonnegut's novel Cat's Cradle:
: Dr. Hoenikker used to say that any scientist who couldn't explain to an eight-year-old what he was doing was a charlatan.
Misattributed
SGU, Podcast #170, October 22nd, 2008 http://www.theskepticsguide.org/podcast/sgu/170
The Skeptics' Guide to the Universe, Podcast, 2000s
interview published in Superstrings: A Theory of Everything? (1988) edited by Paul C. W. Davies and Julian R. Brown, p. 208-209
Context: God was always invented to explain mystery. God is always invented to explain those things that you do not understand. Now, when you finally discover how something works, you get some laws which you're taking away from God; you don't need him anymore. But you need him for the other mysteries. So therefore you leave him to create the universe because we haven't figured that out yet; you need him for understanding those things which you don't believe the laws will explain, such as consciousness, or why you only live to a certain length of time — life and death — stuff like that. God is always associated with those things that you do not understand. Therefore I don't think that the laws can be considered to be like God because they have been figured out.
“Let me explain something to you, Fresh Mouth: I'm the only one who makes jokes.”
http://www.youtube.com/watch?v=BIYBki9QTZw&feature=related
Quotes from Judge Judy cases, Dress, stand, speak properly
“If you can't explain it simply, you don't understand it well enough.”
“If you can't explain it to a six year old, you don't understand it yourself.”
Variant: If you can't explain it to a six year old, you don't understand it yourself.
“It is easy to understand God as long as you don't try to explain him.”