1. WhAt Is
thIs thIng cAlled
ScIeNcE?
BlaCk bob the Bold
LeaPs BraVely Into
UncErtan DeaTh.
a VicToria JunIor ColLege KnoWlEdge & InqUiry LecTure. Wong yew LeoNg.
2. thE meAning of iT all
“scIence means, someTimes, a spEcial methOd of findinG
ThingS out. soMetimEs it meanS the body of kNowledgE
ArisiNg frOm thE thiNgs fOund oUt. it may Also Mean
The nEw thIngs You cAn do when you Have Found
SometHing oUt, or tHe acTual Doing of nEw thinGs.
RiChArD p. fEyNmAn
3. thE meThods, toolS and sensIbiliTies Of scIentistS
thE bodY of KnowlEdge ProduCed bY sciEntistS
thE valUe of sciencE
6. UUUU UU
U U
HUUU
f
neW or UnexpEcted
PhenoMenon
PrObLeM
alL apeS walK on Four leGs.
(idEntifIed wIthin the
ConteXt of an eXistiNg seT
Of acCepteD theOries.)
8. H pReDiCtIoNs
(a PriorI RejecTion Rules)
hyPothesIs: huMan bEings are
A difFerenT speCies From apEs.
1. huMans And aPes aRe unAble tO
InterBreed and ProduCe feRtile
OffspriNg.
2. humaN dNa is sIgnifIcantlY
DiffeRent From apE dNa.
11. do scieNtistS alwayS
AccepT a hYpothEsis
When ExperImentAl/
ObserVatioNal eVidencE
ConfiRms it?
do scieNtistS alwayS
DiscaRd a HypotHesis
When ExperImentAl/
ObserVatioNal eVidencE
ContrAdicts It?
HHHHHHHthE sciEntifIc coMmunitY
whAt roLe do they
Play In knOwledgE
ConstRuctiOn?
12. scIence is oPen tO revIsion.
(reFers To boTh neWly aDvancEd hyPotheSes anD
EstabLisheD theOries.)
13. scIence is oPen tO revIsion.
whAt doEs thIs reAlly meAn?
whAt doEs thIs idEa teLl us abouT the
NaturE of ScienTific inquiRy?
14. whAt’S the big Deal About
RevisIng oUr hyPothesEs?
whAt arE we ChangIng oUr miNds aboUt?
whY are we cHangiNg ouR minDs?
hoW do We chAnge Our minDs?
15. baRry fEels SomeoNe hoLding
Him fRom bEhind, but There’S
No onE theRe.
ghOsts Exist!
whAt prEdictIons Can wE LogicAlly Deduce from the HypotHesis
That GhostS exiSt? whaT IndepEndenT obsErvatioNs/Tests can
We maKe/ConduCt to checK wheTher The pRedicTions are trUe?
16. H! U!
sCiEnCe NoN-sCiEnCe
f = mA ghOsts Exist.
hyPotheSes arE
IndepEndenTly tEstabLe.
hyPotheSes aRe noT
IndepEndenTly tEstabLe.
prEdictIons Are cLear And
IndepEndenTly oBservabLe/TestablE
crUcial obServaTions/ExperImentS are
RepeaTable
No cleaR prEdictIons
prEdictIons Are nOt inDepenDentlY
ObserVable/TestablE
crUcial obServaTions/ExperImentS are
Not rEpeatAble
17. scIence is nOt neCessaRily Better, oR
More ImportaNt, than non-ScienCe.
18. H! H!
sCiEnCe pSeUdOsCiEnCe
1. boLd hyPotheseS
2. unBiased, unprEjudiceD
3. doEs noT relY on ArbitRary
JudgeMents
4. gaMely AdmitS defEat iN the face
Of ovErwheLming counTerevIdencE
5. usEs reLiablE metHods
6. exPlainS cauSal mEchanisM
1. hyPotheSes aRe noT bolD
2. biAsed And pRejudIced
3. rely on aRbitrarY JudgeMents
4. trIes tO wigGle oUt of trouBle bY
IntroDucinG ad Hoc hYpothEses
5. usEs unReliaBle mEthodS
6. no causAl meChanisM
19. H
huMan bEings are A difFerenT speCies From apEs.
H
soMe apEs waLk on two leGs.
H
soMe anImals walk on tWo leGs.
VeRy BoLd
NoT sO BoLd
ChIcKeN pOoP
20. “thE forcE (F) exerTed bY an
ObjecT is Given by iTs masS (M)
And rAte oF accEleraTion (A).”
“f = ma”
21. shOuld We reGard ScienTific claiMs witH
GreateR SceptIcism?
whY has therE beeN so Much TheorEticaL
RevisIon iN the histOry oF scienCe?
22. obServaTions are Not pErfect.
we are LimitEd by how Our pErcepTual
OrganS work.
we are LimitEd by techNologY and enviRonmeNtal FactoRs.
we are LimitEd by our ConcePtual struCtures. e!
)!
23. “moTion Does Not aFfect the WeighT of An objeCt.”
(prEdictiOn: if yOu spIn a Top aNd weIgh iT (While it iS spiNning), and
Then Weigh it aFter It haS stoPped SpinniNg, it wIll wEigh The saMe.)
a SpinnIng tOp weIghs More Than A staTionaRy toP by A few partS in
Less Than A billiOn. if the Top sPins Fast EnougH so That The sPeed oF
The eDges ApproAches 299,338 KilomEtres per Second, the WeighT
IncreAse iS appReciabLe, but Not uNtil thEn.
24. hyPotheSes aNd thEorieS in ScienCe arE
InducTively deriVed froM CurreNtly
AvailabLe evidenCe.
gobbLe?
hi toBy! it’S
ThankSgivinG
Today. do you
Know What That
Means?
29. I’M preTty surE I’M rigHt. i Have A
TruckLoad Of evIdencE to Back mE
Up. i Could be wroNg, of cOurse. I’M
AlwayS wilLing To reConsiDer iF
SomeoNe shOws mE somEthinG thaT
SuggeSts thaT i May bE misTaken.
30. HHHHHHHthE sciEntifIc coMmunitY
thE indIviduAl is the Locus of eRror And iGnoranCe, and BecomEs selF-
Aware only when he iNteraCts wIth oThers.
so, scieNtifiC inqUiry Is noT onlY FalliBilistIc, but Also Social.
eaCh geNuine inquIrer ContrIbuteS to A vasT entErpriSe wiThin And aCross
GenerAtions, makiNg hiS worK freEly aVailaBle tO otheRs; even if hE faiLs,
His wOrk wIll bE one of tHe caRcassEs ovEr whIch fUture geneRatioNs of
InquiRers Climb as tHey sTorm The fOrtreSs of knowLedge.
if this fallIble And iMperfEct sCientIfic InquirY
Were To coNtinuE lonG enougH (AlthoUgh tHere
Is no guarAntee that it wiLl), a finAl,
IndefEasibLy seTtled opinIon wOuld Be agreEd.
32. prOgresS in ScienCe is only possIble BecauSe scIentiSts rEcognisE
The eXisteNce oF douBt abOut tHeir FindinGs.
beCause they have this doubt, they contInue To loOk in new
DirecTions for New ideAs.
yet, scieNtistS musT feeL cerTain EnougH aboUt thEir fIndinGs to
Think that they have got It rigHt, otheRwise they woulD not have
PubliShed Their findIngs And oThers woulD not have inveNted
WondeRful MachiNes oN the basiS of Their findinGs.
33. 8!daviD deUtsch. “a neW waY to exPlain exPlanatiOn.”
TedgLobal, 2009. (htTp://wWw.tEd.cOm/Talks/laNg/En/
David_DeutsCh_a_nEw_wAy_To_ExplaIn_ExplaNation.htMl)
riChard P. feYnman. thE meAning oF it aLl. peNguin booKs,
1998. (pdf versIon cUrrenTly aVailaBle oN the inTernet.)