Richard W. Hamming Learning to Learn The Art of Doing Science and Engineering Session 26: Experts Learning to Learn The Art of Doing Science and Engineering.

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Richard W. Hamming Learning to Learn The Art of Doing Science and Engineering Session 26: Experts Learning to Learn The Art of Doing Science and Engineering Session 26: Experts

Expert Definition “An expert is one who knows everything about nothing and a generalist is someone who knows nothing about everything.” An expert generally wins over a generalist Use of jargon (terms unfamiliar to the generalist)Use of jargon (terms unfamiliar to the generalist) Invokes basic principles (potentially irrelevant to the discussion) to “snow” the generalistInvokes basic principles (potentially irrelevant to the discussion) to “snow” the generalist “An expert is one who knows everything about nothing and a generalist is someone who knows nothing about everything.” An expert generally wins over a generalist Use of jargon (terms unfamiliar to the generalist)Use of jargon (terms unfamiliar to the generalist) Invokes basic principles (potentially irrelevant to the discussion) to “snow” the generalistInvokes basic principles (potentially irrelevant to the discussion) to “snow” the generalist

Paradigm Shifts The Structure of Scientific Revolutions by Thomas Kuhn Talked of paradigms and examined the structure of scientific progress (based on series of assumptions)Talked of paradigms and examined the structure of scientific progress (based on series of assumptions) Discussed what it takes to create a “paradigm shift”Discussed what it takes to create a “paradigm shift” Example: Relativity and quantum mechanics caused paradigm shifts (i.e. contradicted current paradigm)Example: Relativity and quantum mechanics caused paradigm shifts (i.e. contradicted current paradigm) The Structure of Scientific Revolutions by Thomas Kuhn Talked of paradigms and examined the structure of scientific progress (based on series of assumptions)Talked of paradigms and examined the structure of scientific progress (based on series of assumptions) Discussed what it takes to create a “paradigm shift”Discussed what it takes to create a “paradigm shift” Example: Relativity and quantum mechanics caused paradigm shifts (i.e. contradicted current paradigm)Example: Relativity and quantum mechanics caused paradigm shifts (i.e. contradicted current paradigm)

Resistance to Change Examples: articles and books were written against relativity and quantum mechanics “We didn’t convert them, we outlived them.”“We didn’t convert them, we outlived them.” “Continental drift” theory by Thomas Dick Took 100 years for this idea to be acceptedTook 100 years for this idea to be accepted Many ideas are lost and later rediscovered, mainly due to an initial resistance to change Examples: articles and books were written against relativity and quantum mechanics “We didn’t convert them, we outlived them.”“We didn’t convert them, we outlived them.” “Continental drift” theory by Thomas Dick Took 100 years for this idea to be acceptedTook 100 years for this idea to be accepted Many ideas are lost and later rediscovered, mainly due to an initial resistance to change

Raising Water 33 feet Books said this feat was impossible due to the air pressure, and the Patent Office refused to issue a patent until it was actually demonstrated to them. Similar feats: Wright Bros first flightWright Bros first flight Supersonic flightSupersonic flight Books said this feat was impossible due to the air pressure, and the Patent Office refused to issue a patent until it was actually demonstrated to them. Similar feats: Wright Bros first flightWright Bros first flight Supersonic flightSupersonic flight

It’s Impossible! All impossibility proofs rest on a series of assumptions which may or may not apply in a particular situation. If an expert says you can do something, he is probably right. If he says it can’t be done, find another expert. Experts can misidentify the problem by placing incorrect assumptions upon the problem (based on their experiences).Experts can misidentify the problem by placing incorrect assumptions upon the problem (based on their experiences). All impossibility proofs rest on a series of assumptions which may or may not apply in a particular situation. If an expert says you can do something, he is probably right. If he says it can’t be done, find another expert. Experts can misidentify the problem by placing incorrect assumptions upon the problem (based on their experiences).Experts can misidentify the problem by placing incorrect assumptions upon the problem (based on their experiences).

Reasons for this Lecture 1.You need to identify the characteristics (faults and benefits) of an expert 2.I’m hoping you will be better than the average expert (and not block progress) 3.You will have to endure more changes than me (and experts don’t like change). 4.I’m hoping that you won’t be left behind after the next paradigm shift. 1.You need to identify the characteristics (faults and benefits) of an expert 2.I’m hoping you will be better than the average expert (and not block progress) 3.You will have to endure more changes than me (and experts don’t like change). 4.I’m hoping that you won’t be left behind after the next paradigm shift.

The Source of New Ideas Looking outside your field for new ideas Example: archeology – carbon dating came from physicistsExample: archeology – carbon dating came from physicists Einstein – submitted 5 papers while at patent officeEinstein – submitted 5 papers while at patent office Telephone Co – undertaker built mechanical operatorTelephone Co – undertaker built mechanical operator Your dilemma: Ignore the crackpots outside of your field (where the new ideas come from) and miss the next big idea, or listen to the crackpots and waste all your timeIgnore the crackpots outside of your field (where the new ideas come from) and miss the next big idea, or listen to the crackpots and waste all your time Looking outside your field for new ideas Example: archeology – carbon dating came from physicistsExample: archeology – carbon dating came from physicists Einstein – submitted 5 papers while at patent officeEinstein – submitted 5 papers while at patent office Telephone Co – undertaker built mechanical operatorTelephone Co – undertaker built mechanical operator Your dilemma: Ignore the crackpots outside of your field (where the new ideas come from) and miss the next big idea, or listen to the crackpots and waste all your timeIgnore the crackpots outside of your field (where the new ideas come from) and miss the next big idea, or listen to the crackpots and waste all your time

The Flaws of the Experts Already covered: Expert assumes he is rightExpert assumes he is right Doesn’t consider his bias in judging new situationsDoesn’t consider his bias in judging new situations Third flaw What made you successful in the past is likely to be counterproductive when applied at a later dateWhat made you successful in the past is likely to be counterproductive when applied at a later date Yet another flaw Experts never come out & say what you’re doing wrongExperts never come out & say what you’re doing wrong Already covered: Expert assumes he is rightExpert assumes he is right Doesn’t consider his bias in judging new situationsDoesn’t consider his bias in judging new situations Third flaw What made you successful in the past is likely to be counterproductive when applied at a later dateWhat made you successful in the past is likely to be counterproductive when applied at a later date Yet another flaw Experts never come out & say what you’re doing wrongExperts never come out & say what you’re doing wrong

The Challenge Recognize what made you successful & try not to impose that criteria on others Example: saving computer time; cycles now take nanosecondsExample: saving computer time; cycles now take nanoseconds Issue: getting in the way of the next generation If asked: give your best answer, but don’t stifle or disregard the views of subordinates Recognize what made you successful & try not to impose that criteria on others Example: saving computer time; cycles now take nanosecondsExample: saving computer time; cycles now take nanoseconds Issue: getting in the way of the next generation If asked: give your best answer, but don’t stifle or disregard the views of subordinates

Experts Past Their Prime Even the best fall victim Einstein opposed Quantum MechanicsEinstein opposed Quantum Mechanics Hamming didn’t truly understand error-correcting codeHamming didn’t truly understand error-correcting code Newton was the last of the ancientsNewton was the last of the ancients Experts freeze their knowledge at a certain point and refuse to incorporate new ideas But avoid being open to everything (“anything’s possible” crowd); use probabilities & common senseBut avoid being open to everything (“anything’s possible” crowd); use probabilities & common sense Even the best fall victim Einstein opposed Quantum MechanicsEinstein opposed Quantum Mechanics Hamming didn’t truly understand error-correcting codeHamming didn’t truly understand error-correcting code Newton was the last of the ancientsNewton was the last of the ancients Experts freeze their knowledge at a certain point and refuse to incorporate new ideas But avoid being open to everything (“anything’s possible” crowd); use probabilities & common senseBut avoid being open to everything (“anything’s possible” crowd); use probabilities & common sense

Wrapping-UpWrapping-Up Opposition to new ideas is enormous Took 10 years for error-correcting code to be adopted by Bell LabsTook 10 years for error-correcting code to be adopted by Bell Labs The more radical the idea, the stronger the opposition from the experts But remember… sometimes the experts are right and the people with the new ideas are wrong Opposition to new ideas is enormous Took 10 years for error-correcting code to be adopted by Bell LabsTook 10 years for error-correcting code to be adopted by Bell Labs The more radical the idea, the stronger the opposition from the experts But remember… sometimes the experts are right and the people with the new ideas are wrong

Human Nature We don’t work well in large groups, and there is an inherent distrust of the outsider Jargon helps keep the group small & the outsider outJargon helps keep the group small & the outsider out Example: departments/employees sabotaging the work of each other within the same companyExample: departments/employees sabotaging the work of each other within the same company Squabbling is not suitable for the future Ask: “should I be doing this or behaving this way?”Ask: “should I be doing this or behaving this way?” Work against the instinct to protect the local groupWork against the instinct to protect the local group We don’t work well in large groups, and there is an inherent distrust of the outsider Jargon helps keep the group small & the outsider outJargon helps keep the group small & the outsider out Example: departments/employees sabotaging the work of each other within the same companyExample: departments/employees sabotaging the work of each other within the same company Squabbling is not suitable for the future Ask: “should I be doing this or behaving this way?”Ask: “should I be doing this or behaving this way?” Work against the instinct to protect the local groupWork against the instinct to protect the local group