Skrevet av Emne: Feynman om "vitenskap"  (Lest 1112 ganger)

Okular

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Feynman om "vitenskap"
« på: 10.04.2016, 13:10:14 »
Snublet tilfeldigvis over denne forelesningen gitt av Richard Feynman til "National Science Teachers Association"s femtende årsmøte i New York 1966, under headingen "What Is Science?", og ble dypt fascinert (og inspirert) av den ærverdige (og navngjetne) gamle fysikers mange kloke ord og betraktninger. Han klarer på mesterlig vis å sette fingeren på så mye ved vår menneskelige natur, ved vår sivilisasjon og historie, og ikke minst ved hvordan vi grunnleggende har det med å forholde oss til virkeligheten omkring oss, enten det er naturen/universet eller andre mennesker, at jeg simpelthen ikke kunne dy meg - jeg måtte begå litt storstilt sitatklipping og -liming og dele det her med dere :P 8) Egentlig burde alle klodens oppvoksende generasjoner fått anledning ikke bare til å høre disse ordene, men fått muligheten til virkelig å forstå og ta de innover seg, på et så tidlig stadium som mulig ...

Merk at Feynman 'bare' var 48 år da han holdt dette framlegget (han døde - altfor tidlig - i 1988). Merk også at klammene i teksten ikke er Feynmans egne, men lagt til i ettertid av en Ralph Leighton.

Here goes. Om "Kunnskapens" historie:

Sitat
There was on this planet an evolution of life to a 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 [primates?] could learn from experience more rapidly and could even learn from another’s experience by watching, or one could show the other, or he saw what the other one did. So there came a possibility that all might learn it, but the transmission was inefficient and they would die, and maybe the one who learned it died, too, before he could pass it on to others.

The question is: is it possible to learn more rapidly what somebody learned from some accident than the rate at which the thing is being forgotten, either because of bad memory or because of the death of the learner or inventors?

So there came a time, perhaps, when for some species [humans?] the rate at which learning was increased, reached such a pitch that suddenly a completely new thing happened: things could be learned by one individual animal, passed on to another, and another fast enough that it was not lost to the race. Thus became possible an accumulation of knowledge of the race.

This has been called time-binding. I don't know who first called it this. At any rate, we have here [in this hall] some samples of those animals, sitting here trying to bind one experience to another, each one trying to learn from the other.

This phenomenon of having a memory for the race, of having an accumulated knowledge passable from one generation to another, was new in the world - but it had a disease in it: it was possible to pass on ideas which were not profitable for the race. The race has ideas, but they are not necessarily profitable.

So there came a time in which the ideas, although accumulated very slowly, were all accumulations not only of practical and useful things, but great accumulations of all types of prejudices, and strange and odd beliefs.

Then a way of avoiding the disease was discovered. This is to doubt that what is being passed from the past is in fact true, and to try to find out ab initio again from experience what the situation is, rather than trusting the experience of the past in the form in which it is passed down. And that is what science is: the result of the discovery that it is worthwhile rechecking by new direct experience, and not necessarily trusting the [human] race['s] experience from the past. I see it that way. That is my best definition.

Om "Vitenskapens" essens, den som synes mer eller mindre 'glemt' i dagens postmoderne samfunn, hvor ideologi, posisjon og profitt synes å styre det meste (en baktanke ved alt):

Sitat
Another of the qualities of science is that it teaches the value of rational thought as well as the importance of freedom of thought; the positive results that come from doubting that the lessons are all true. You must here distinguish - especially in teaching - the science from the forms or procedures that are sometimes used in developing science. It is easy to say, "We write, experiment, and observe, and do this or that." You can copy that form exactly. But great religions are dissipated by following form without remembering the direct content of the teaching of the great leaders. In the same way, it is possible to follow form and call it science, but that is pseudo-science. In this way, we all suffer from the kind of tyranny we have today in the many institutions that have come under the influence of pseudoscientific advisers.

We have many studies in teaching, for example, in which people make observations, make lists, do statistics, and so on, but these do not thereby become established science, established knowledge. They are merely an imitative form of science analogous to the South Sea Islanders' airfields - radio towers, etc., made out of wood. The islanders expect a great airplane to arrive. They even build wooden airplanes of the same shape as they see in the foreigners' airfields around them, but strangely enough, their wood planes do not fly. The result of this pseudoscientific imitation is to produce experts, which many of you are. [But] you teachers, who are really teaching children at the bottom of the heap, can maybe doubt the experts. As a matter of fact, I can also define science another way: Science is the belief in the ignorance of experts.

When someone says, "Science teaches such and such," he is using the word incorrectly. Science doesn't teach anything; experience teaches it. If they say to you, "Science has shown such and such," you might ask, "How does science show it? How did the scientists find out? How? What? Where?"

It should not be "science has shown" but "this experiment, this effect, has shown." And you have as much right as anyone else, upon hearing about the experiments - but be patient and listen to all the evidence - to judge whether a sensible conclusion has been arrived at.

In a field which is so complicated [as education] that true science is not yet able to get anywhere, we have to rely on a kind of old-fashioned wisdom, a kind of definite straightforwardness. I am trying to inspire the teacher at the bottom to have some hope and some self-confidence in common sense and natural intelligence. The experts who are leading you may be wrong.

I have probably ruined the system, and the students that are coming into Caltech no longer will be any good. I think we live in an unscientific age in which almost all the buffeting of communications and television - words, books, and so on - are unscientific. As a result, there is a considerable amount of intellectual tyranny in the name of science.

Finally, with regard to this time-binding, a man cannot live beyond the grave. Each generation that discovers something from its experience must pass that on, but it must pass that on with a delicate balance of respect and disrespect, so that the [human] race - now that it is aware of the disease to which it is liable - does not inflict its errors too rigidly on its youth, but it does pass on the accumulated wisdom, plus the wisdom that it may not be wisdom.

It is necessary to teach both to accept and to reject the past with a kind of balance that takes considerable skill. Science alone of all the subjects contains within itself the lesson of the danger of belief in the infallibility of the greatest teachers of the preceding generation.

I dag anses "ekspertene", "autoritetene", og deres ord i seg selv som "Vitenskap". De kan synse og mene og proklamere fritt og folk tar det umiddelbart til seg som en etablert vitenskapelig sannhet. Det er ikke vitenskapen som metode man viser ærbødighet i dag (om man noen gang har gjort det). Det er "ekspertene".

Det Feynman sa i 1966 om hvordan folk har en tendens til å slenge om seg med utsagn som 'Vitenskapen/forskningen sier eller forteller oss det og det', hvor man med "vitenskapen/forskningen" da egentlig jo sikter til "ekspertenes meninger" om et gitt tema, tar dagens CO2-varmisters versjon av "Klimavitenskapen" så på kornet at det nesten er skummelt. Men historien går jo som kjent i sirkler. Så kunnskapsrik Menneskeheten enn måtte være, så lærer den fortsatt aldri ...
« Siste redigering: 10.04.2016, 13:21:17 av Okular »

Telehiv

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Sv: Feynman om "vitenskap"
« Svar #1 på: 10.04.2016, 13:53:15 »
Okular,
takk for et fabelaktig inspirerende innlegg!
Nobelprisvinneren Feynman er virkelig en messe verd, og hans mer generelle tanker rundt vitenskap og høyere refleksjon siteres jo fremdeles langt utenfor hans faglige kjerneområder. Jeg leste en gang hans livsoppsummerende essaysamling "Surely You're Joking, Mr. Feynman!", men må nok ta den en gang til for å kunne gjengi noenlunde fornuftig hva hans hovedpoenger var der.



Men jeg mente å huske at han bl.a. beskrev hvordan en safe kunne åpnes rent "vitenskapelig" uten nøkler eller tildelt kode, og slo derfor opp i wiki for å sjekke om jeg husket rett. Og joda, les om alle metoder dette Feynmans første innspill har ført til mht. teknikker du kan bruke for å bli en førsteklasses - og vitenskapelig basert - "safe-cracker": https://en.wikipedia.org/wiki/Safe-cracking

Tips: Når du hives ut av ditt klimainstitutt for kjettersk virksomhet, kan du altså gjøre deg en levevei av avansert skapåpning. Kanskje du også finner noen nye Climategate-dokumenter før du forlater arbeidsstedet?!?

Feynman har jo også gitt ut flere populærvitenskapelige bøker: "What Do You Care What Other People Think?" og "Tuva Or Bust!". Hans fysikkbøker er nok utenfor rekkevidde av de fleste, men disse bøkene skal visst være skikkelig mind-blowing de også selv for lekfolk innen naturvitenskapen.

Så når du først har trukket denne eminente vitenskapsmannen fram i lyset igjen er det bare å håpe at flest mulig i vitenskapsdebattene rundt om prøver å tilstrebe en lignende respekt for det sanne åndsliv! Det er kanskje ikke så mange igjen av dette klassiske kaliber i dagens naturvitenskaper?

« Siste redigering: 10.04.2016, 13:58:26 av Telehiv »

Amateur2

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Sv: Feynman om "vitenskap"
« Svar #2 på: 11.04.2016, 10:58:37 »
Hans fysikkbøker er nok utenfor rekkevidde av de fleste, men disse bøkene skal visst være skikkelig mind-blowing de også selv for lekfolk innen naturvitenskapen.

Da vil jeg unnta The Feynman Lectures som er et glimrende læreverk og oppslagsverk. Det dekker omtrent alt fra grunnleggende fysikk basert på realfaglig kunnskap fra videregående skole og opp mot hans noe tyngre tilgjengelige "Quantum Electro Dynamics"

Telehiv

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Sv: Feynman om "vitenskap"
« Svar #3 på: 11.04.2016, 11:06:22 »
Hans fysikkbøker er nok utenfor rekkevidde av de fleste, men disse bøkene skal visst være skikkelig mind-blowing de også selv for lekfolk innen naturvitenskapen.

Da vil jeg unnta The Feynman Lectures som er et glimrende læreverk og oppslagsverk. Det dekker omtrent alt fra grunnleggende fysikk basert på realfaglig kunnskap fra videregående skole og opp mot hans noe tyngre tilgjengelige "Quantum Electro Dynamics"

Strålende, Amateur2!
Her fikk vi altså hele pakken servert elektronisk. Her er det jo bare å dykke ned og suge til seg. Suveren kapittelinndeling gjør det også lett å finne fram til de tema du vil undersøke nærmere. Merk dere denne linken, folkens!