06 FEB 2015 by ideonexus
The One-Electron Universe
I
received a telephone call one day at the graduate college at
Princeton from Professor Wheeler, in which he said, "Feynman, I
know why all electrons have the same charge and the same mass"
"Why?" "Because, they are all the same electron!" And, then he
explained on the telephone, "suppose that the world lines which
we were ordinarily considering before in time and space - instead
of only going up in time were a tremendous knot, and then, when
we cut through the knot, by the pl... 1 
notes
notes24 MAR 2013 by ideonexus
Imagination Builds On Our Experiences
...you can’t have a storage space that is
filled to the brim with boxes. How would
you ever come inside? Where would you
pull out the boxes to find what you need?
How would you even see what boxes
were available and where they might be
found? You need space. You need light.
You need to be able to access your attic’s
contents, to walk inside and look around
and see what is what.
And within that space, there is freedom.
You can temporarily place there all of the
observations you’ve gathe...Folksonomies: knowledge imagination
Folksonomies: knowledge imagination
1 notes
notesIt works within the confines of what we know and how we can work with that knowledge.
16 MAY 2012 by ideonexus
Feynman on God
On the contrary, 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 ... 1 notes
notesGod is used to explain what we haven't figured out yet.
03 JAN 2011 by ideonexus
Computer Programming Brings Complex Thought to the Masses
Omni: Does that limit the number of people who can contribute, or even understand what's being done?
Feynman: Or else somebody will develop a way of thinking about the problems so that we can understand them more easily. Maybe they'll just teach it earlier and earlier. You know, it's not true that what is called "abstruse" math is so difficult. Take something like computer programming, and the careful logic needed for that--the kind of thinking that mama and papa would have said was only for ...
1 A half century ago, the logic required to do computer programming was considered something only professors could do, now everyone does it.
03 JAN 2011 by ideonexus
A Reversible NAND Gate
The great discovery of Bennett and, independently, of Fredkin is that it is possible to do computation with a different kind of fundamental gate unit, namely, a reversible gate unit. I have illustrated their idea--with a unit which I could call a reversible NAND gate. It has thre inputs and thre outputs. Of the outputs, tow, A' and B', are the same as two of the inputs, A and B, but the third input works this way. C' is the same as C unless A and B are both 1, in which case it changes whateve...Folksonomies: computing
Folksonomies: computing
1 notes
notesFeynman describes a reversible logic gate, with three inputs and three outputs, one of which tracks the change in input and output, allowing the computer to reverse its operation and potentially pursue a different route.
03 JAN 2011 by ideonexus
Science Must Confront Religion
The remark which I read somewhere, that science is all right so long as it doesn't attack religion, was the clue that I needed to understand the problem. As long as it doesn't attack religion it need not be paid attention to and nobody has to learn anything. So it can be cut off from modern society except for its applications, and thus be isolated. And then we have this terrible struggle to try to explain things to people who have no reason to want to know. But if they want to defend their ow... 1 notes
notesSo long as it doesn't, it can be ignored--but Feynman might be wrong about this.
03 JAN 2011 by ideonexus
Number of Bits for a Set of Encyclopedias are Minuscule C...
I have estimaged how many letters there are in a the Enclyclopaedia, and I have assumed that each of my 24 million books is as big as an Encyclopaedia volume, and have calculated, then, how many bits of information there are (10^15). For each bit I allow 100 atoms. And it turns out that all of the information that man has carefully accumulated in all the books in the world can be written in this form in a cube of material one two-hundredths of an inch wide--which is the barest piece of dust t... 1 notes
notesFeynman estimates the number of atoms neccessary for storing a set of encyclopedias, and then compares that to the amount of data included in a DNA string.
03 JAN 2011 by ideonexus
The Evolution of Culture
What science is, I think, may be something like this: There was on this planet an evolution of life to the stage that there were evolved animals, which are intelligent. I don't mean just human beings, but animals which play and which can learn something from experience (like cats). But at this stage each animal would have to learn from its own experience. They gradually develop, until some animal coudl learn from experience by watching, or one could show the other, or he saw what the other on...
1 Although Feynman calls it "time-binding," this sounds very much like memetics.
30 NOV -0001 by ideonexus
Spelling is the Problem
Now let me get to a lower level still in this question. And that is, all the time you hear the
question, "why can't Johnny read?" And the answer is, because of the spelling. The
Phoenicians, 2000, more, 3000, 4000 years ago, somewhere around there, were able to
figure out from their language a scheme of describing the sounds with symbols. It was
very simple. Each sound had a corresponding symbol, and each symbol, a corresponding
sound. So that when you could see what the symbols' sounds w...Folksonomies: phoenetics
Folksonomies: phoenetics
Putting letters together into words is one of the most basic skills required for literacy. If this basic skill is so hard for so many people to grasp, then, Feynman argues, there is a problem with the way words are spelled.
