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发表于 2012-8-14 00:55
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其实比饶毅更牛的回复是 Upenn 的 LAI JIANG
: T% P0 Q% h1 f如果是中国长大的,英语能到这种程度真是很不简单。
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http://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html8 {# O$ _# A+ y4 ^1 o; k) Z& r
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FROM LAI JIANG, Department of Chemistry, University of Pennsylvania
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( E/ v, W: Z; RIt is a shame to see Nature — which nearly all scientists, including myself
6 _5 k% I0 S5 y. U3 `. V: }, regard as one of the most prestigious and influential physical-science
5 @& ^" H9 x, y& D7 X3 @* hmagazines — publish a thinly veiled biased article like this. Granted, this
3 @" r: n9 r/ ?$ s0 eis not a peer-reviewed scientific article and did not go through the
# G$ H. r9 V3 Q M3 }scrutiny of picking referees. But to serve as a channel for the general
, X3 \6 k9 N' Q3 Y1 d6 ypopulace to be in touch with and appreciate science, the authors and editors* o; ~2 U- i3 D6 R# N3 a
should at least present the readers with facts within the proper context,
" c% t0 `2 _9 A) K6 g3 mwhich they blatantly failed to do.
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1 p$ t8 {5 s# A8 [' ]6 G- e; FFirst, to identify Ye’s performance increase, Ewen Callaway compared her
' `& M0 T2 J' NOlympic 400-metre IM time with her performance at the World Championships in
; c7 S( K0 {8 X/ ?* ~2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “
. k3 Y) C; {* N* |4 h2 H5 a- danomalous” improvement of around 7 seconds (6.72 s). In fact, her previous
7 J) t% |1 p4 f7 y2 ]personal best was 4:33.79 at the Asian Games in 2010. This leads to an1 S2 p" i# h( R p$ r
improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the
' u; j3 E0 A W v9 c# J/ }) udifference between the gold and silver medal, I see no reason for 5.38 s to
. ?) p* v6 R" O/ nbe treated as 7 s.. U: e% C7 V; r( c& t1 @
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Second, as previously pointed out, Ye is only 16 years old and her body is
/ l- b$ m: u! N$ B+ cstill developing. Bettering oneself by 5 seconds over two years may seem& z( m2 y, E) S) m
impossible for an adult swimmer, but it certainly happens among youngsters.( @# z4 ?" Q- k7 _3 }& [5 E
An interview with Australian gold medallist Ian Thorpe revealed that his 4007 s, B6 W% o% @3 w+ W
-metre freestyle time improved by 5 seconds between the ages of 15 and 16.- J D9 Q4 U6 @3 j# W) Y- }( O
For regular people, including Callaway, it may be hard to imagine what an3 ~, I( `9 K3 b. X, E* B$ Q
elite swimmer can achieve as he or she matures and undergoes scientific and. T- @9 ]* e, x5 i
persistent training. But jumping to the conclusion that it is “anomalous”
% F2 }4 Q6 n& N* N( x1 w' a: H7 ibased on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.7 W8 F- P% f$ k- M. K
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Third, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook
1 y# _# Q* N7 j$ O, R! O- O( Q+ k8 c/ {* A9 \example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in
4 H8 G g& \$ X$ P: e( d- i& Mthe last 50 metres, but Lochte had a huge lead in the first 300 metres, so
6 J! r/ [/ j2 b) _8 F" khe chose not to push himself too hard and to conserve his energy for later
5 O" E' l$ H+ Gevents (whether this conforms to the Olympic spirit and the ‘use one’s
, S0 N, q0 |/ r! \, E* U" Q) G+ nbest efforts to win a match’ requirement that the Badminton World
/ _0 L$ c3 }; b7 e- d9 jFederation recently invoked to disqualify four badminton pairs is another
' V- L; @7 [+ q6 }7 d) Ctopic worth discussing, though probably not in Nature). Ye, on the other
8 r8 d0 c0 e6 o: P* k ]/ khand, was trailing behind after the first 300 metres and relied on freestyle
`# n; u# J' A+ S& X% S7 n7 C6 o, in which she has an edge, to win the race. Failing to mention this. A* D) g! l" R9 k: K% ?
strategic difference, as well as the fact that Lochte is 23.25 seconds; y c6 c& |9 h, k0 [- E
faster (4:05.18) than Ye overall, creates the illusion that a woman swam
2 e7 S; k4 e' ^' Afaster than the best man in the same sport, which sounds impossible. Putting7 ^( y J. }5 T. i' q' K+ V
aside the gender argument, I believe this is still a leading question that
) r4 \5 u/ i6 Zimplies to the reader that there is something fishy going on.* H+ d5 }1 y+ E1 x! K+ s
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Fourth is another example of cherry-picking. In the same event, there are: l6 S+ m4 T. v4 D5 [
four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93
1 M7 Q- {; Y% C2 b: z6 ks) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s+ u( S2 J# q R- b: U
), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns- g( w: a* W; v! n, P& e4 c
out, if we are just talking about the last 50 metres in a 400-metre IM,' B" a1 m6 i: D3 j' k& Q
Lochter is not the example I would have used if I were the author. What kind$ t$ S/ w5 ^# ^! M1 N4 A
of scientific rigorousness is Callaway trying to demonstrate here? Is it
3 @' A7 s; u8 |logical that if Lochter is the champion, we should assume that he leads in
, X, Z2 b3 J/ L* B3 i: hevery split? That would be a terrible way to teach the public how science: S9 P* _/ K" j& I! @
works.
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Fifth is the issue I oppose the most. Callaway quotes Ross Tucker and' ?1 j" b* F7 d7 s- t& I! o
implies that a drug test cannot rule out the possibility of doping. Is this
% o+ v2 R3 z" c7 Ykind of agnosticism what Nature really wants to teach its readers? By that; x; V: u I! K6 p. g- x! [1 y3 F
standard, I estimate that at least half of the peer-reviewed scientific
0 Q8 |- Q9 H' K- V+ |- B5 Q' Tpapers in Nature should be retracted. How can one convince the editors and7 x0 d& @8 h2 m, @- @* f2 W
reviewers that their proposed theory works for every possible case? One7 }; v$ g, i2 ~
cannot. One chooses to apply the theory to typical examples and to$ Y2 c% \. c7 V' J
demonstrate that in (hopefully) all scenarios considered, the theory works
. G* ^. R" d! h% O T3 uto a degree, and that that should warrant publication until a counterexample* I0 G- ~6 w: e" G
is found. I could imagine that Callaway has a sceptical mind, which is
2 `! h+ Z# H+ d$ m' h* n9 |* R: ~: kcrucial to scientific thinking, but that would be put to better use if he
* J# p( G, ]. k6 [8 T3 u& z( Twrote a peer-reviewed paper that discussed the odds of Ye doping on a highly
7 o/ V; I" c7 Y+ L1 k" hadvanced, non-detectable drug that the Chinese have come up with in the+ X0 U/ b' {# o' B4 g
past 4 years (they obviously did not have it in Beijing, otherwise why not
U# E, M2 |$ z9 B1 E6 a- [* huse it and woo the audience at home?), based on data and rational derivation
0 O* r( }, ?( `. This article, however, can be interpreted as saying that all athletes are- Y9 P% d) M$ t' ]1 V
doping and the authorities are just not good enough to catch them. That may
1 y- y& l5 P) U Obe true, logically, but definitely will not make the case if there is ever a- y1 h( K5 |4 L( D
hearing by the governing body for water sports, FINA, to determine if Ye+ f5 s0 Z4 f! |* [" p
has doped. To ask whether it is possible to obtain a false negative in a& A9 B& H A/ p+ L- O6 @9 }
drug test looks like a rigged question to me. Of course it is possible:1 n5 w ~7 x9 E3 p, H+ Z5 ]
other than the athlete taking a drug that the test is not designed to detect
# u1 H6 h% L+ @% u& ?: J1 c, anyone who has taken quantum 101 will tell you that everything is% L. _0 @7 ~) {. M
probabilistic in nature, and so there is a probability that the drug in an! c7 ?& T+ R- j* A3 z0 ?3 W
athlete’s system could tunnel out right at the moment of the test. A slight1 v4 j' ]6 H$ i m+ h# _
chance it may be, but should we disregard all test results because of it?
, b; o9 L9 g6 B, H/ jLet’s be practical and reasonable, and accept that the World Anti-Doping$ S- m! ?( {1 t+ o9 J, Z
agency (WADA) is competent at its job. Ye’s urine sample will be stored for2 M% x, e' F- _+ s5 a9 I
eight years after the contest for future testing as technology advances.
. |+ Z; Z2 _( G3 m# q$ M( O# wInnocent until proven guilty, shouldn’t it be?: ^/ }' `! _( f& `# R- m" E; v
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Sixth, and the last point I would like to make, is that the out-of-
, V# @9 S2 T" Gcompetition drug test is already in effect, which Callaway failed to mention
2 |: a* C# b4 ]' `. As noted in the president of WADA’s press release, drug testing for
5 ?# G+ ~& |, z! j2 {% yOlympians began at least six months before the opening of the London J8 O& G# M8 S5 U& c7 _
Olympics. Furthermore, 107 athletes have been banned from this Olympics for8 g( [$ ^+ s, G4 d- X% v
doping. That may be the reason that “everyone will pass at the Olympic
3 A+ ~0 G: u- i& D/ C4 Zgames. Hardly anyone fails in competition testing” — those who did dope( S+ T3 Z# k1 p. l
have already been caught and sanctioned. Callaway is free to suggest that a5 n% g) e, F$ q2 v$ c3 W6 s
player could have doped beforehand and fooled the test at the game, but this
% P8 L# @. T, u* |% L# apossibility is certainly ruled out for Ye.( d4 Y9 Y4 ]" H/ m
# p2 T. l2 l& {% h0 bOver all, even though Callaway did not falsify any data, he did (
" r5 f3 k5 h1 {$ I* y% iintentionally or not) cherry-pick data that, in my view, are far too( g, V5 _, e1 z
suggestive to be fair and unbiased. If you want to cover a story of a
' m/ K2 ]& ^) {) r) x! s+ \% isuspected doping from a scientific point of view, be impartial and provide& N+ t/ w: K- }9 [1 [9 d5 ^# p$ i
all the facts for the reader to judge. You are entitled to your! y$ i: \: _ k* u, H6 O
interpretation of the facts, and the expression thereof in your piece,
" c6 n0 A5 C- g. v' E* V' }! Vexplicitly or otherwise, but showing only evidence that favours your, ~5 ~. q% _8 p/ v6 U3 j
argument is hardly good science or journalism. Such an article in a journal5 ]5 \! q. B7 E7 l
such as Nature is not an appropriate example of how scientific research or
8 Y. f6 A6 J; {! ~. V8 G+ treporting should be done. |
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