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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
; g7 {" ~6 k6 J- C0 V如果是中国长大的,英语能到这种程度真是很不简单。6 q8 Y1 g1 |& i5 L, w
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http://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html
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$ q3 s& t6 X6 E/ N5 z) `FROM LAI JIANG, Department of Chemistry, University of Pennsylvania
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+ x* z8 \: b- D+ O) V; {It is a shame to see Nature — which nearly all scientists, including myself
. _5 B; K ^! P n, regard as one of the most prestigious and influential physical-science8 ~/ j# c4 `% Q
magazines — publish a thinly veiled biased article like this. Granted, this9 v3 r4 Q4 [: d7 P( K2 p
is not a peer-reviewed scientific article and did not go through the
7 ^* ?. c7 V& } Ascrutiny of picking referees. But to serve as a channel for the general
) Q6 i+ E& }! A5 C: {2 t; l9 Hpopulace to be in touch with and appreciate science, the authors and editors
# h& L; g4 t0 a$ y7 Cshould at least present the readers with facts within the proper context,
1 Q# @8 t' Z0 o* O8 k, Fwhich they blatantly failed to do.
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7 \; \# m i1 U5 v5 t* qFirst, to identify Ye’s performance increase, Ewen Callaway compared her. q4 w' A* u: o# D6 s
Olympic 400-metre IM time with her performance at the World Championships in
- Q$ x3 E; b. C$ k5 R. n2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “
5 n; N, D" v h8 d4 sanomalous” improvement of around 7 seconds (6.72 s). In fact, her previous
7 _3 p* j, C% f9 X) f5 Epersonal best was 4:33.79 at the Asian Games in 2010. This leads to an }) h- p5 r6 c$ j4 D; b7 r
improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the% N+ }+ @# X8 C" r: S0 k5 K( j
difference between the gold and silver medal, I see no reason for 5.38 s to5 Z# E8 j! B6 K4 q" v3 ]& s# y4 ?
be treated as 7 s.
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Second, as previously pointed out, Ye is only 16 years old and her body is7 |, C' ~- M. C3 R: P) O( a
still developing. Bettering oneself by 5 seconds over two years may seem
: J: ?1 ^/ L# timpossible for an adult swimmer, but it certainly happens among youngsters.1 C9 Y5 O% Z* P1 Z% ]. s* [
An interview with Australian gold medallist Ian Thorpe revealed that his 4003 @$ X0 l3 |0 _ r2 I9 v" v
-metre freestyle time improved by 5 seconds between the ages of 15 and 16.& n8 m" p v$ K9 a
For regular people, including Callaway, it may be hard to imagine what an' Y z8 l0 A3 C9 u
elite swimmer can achieve as he or she matures and undergoes scientific and
w& p. i! ?. g- T6 U8 w3 p7 Bpersistent training. But jumping to the conclusion that it is “anomalous”
6 R: Y% O8 p$ B: e: }( Bbased on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.9 z$ x M- q: G# c
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Third, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook$ u) V( Y" ]8 ^' i( i5 x
example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in
# I" m2 g5 M3 s* o8 Y. k6 \the last 50 metres, but Lochte had a huge lead in the first 300 metres, so
" z$ v; M+ f; n6 Khe chose not to push himself too hard and to conserve his energy for later i; d- W% |! F; s/ J8 P6 b2 S
events (whether this conforms to the Olympic spirit and the ‘use one’s
4 U; h6 t# Q9 A# F5 i* Ubest efforts to win a match’ requirement that the Badminton World
1 {" |7 T, m- @Federation recently invoked to disqualify four badminton pairs is another
* i' S" z9 K4 }, {' G6 ttopic worth discussing, though probably not in Nature). Ye, on the other2 M W8 v# R T2 Y8 S/ W
hand, was trailing behind after the first 300 metres and relied on freestyle; E* X# r6 f0 ]8 F
, in which she has an edge, to win the race. Failing to mention this
) |+ }4 y" p7 D$ ?$ _5 B( Vstrategic difference, as well as the fact that Lochte is 23.25 seconds
1 t6 I2 U7 Y& A9 N/ \faster (4:05.18) than Ye overall, creates the illusion that a woman swam5 A8 B; S2 ~$ j' n! [
faster than the best man in the same sport, which sounds impossible. Putting: r9 r; P! K; b( f
aside the gender argument, I believe this is still a leading question that
2 k7 U- P9 C) aimplies to the reader that there is something fishy going on.3 f) c; w& X% X) l
% ]2 {+ X9 f$ ^1 YFourth is another example of cherry-picking. In the same event, there are
: W9 d# ^4 C, q2 w* k; Lfour male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93$ i* B& ~& \' O% ?7 X
s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s
y' B) }6 }+ H5 S, s1 N f), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns+ r z: v7 i. R, B
out, if we are just talking about the last 50 metres in a 400-metre IM,
( X: ^( `" i% Z. xLochter is not the example I would have used if I were the author. What kind
: t) H2 l. U7 J1 ?) v" Oof scientific rigorousness is Callaway trying to demonstrate here? Is it' a6 b, S$ w- o3 t# V) N7 H- T
logical that if Lochter is the champion, we should assume that he leads in
$ H+ U( v5 e7 G! l7 N9 levery split? That would be a terrible way to teach the public how science8 n& h, |: m# V' R& c
works.
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% h; O/ q( D' uFifth is the issue I oppose the most. Callaway quotes Ross Tucker and
1 C; s w( _7 f+ oimplies that a drug test cannot rule out the possibility of doping. Is this. R5 d" `& p, Y* @! b0 b' L7 Q; ]# j
kind of agnosticism what Nature really wants to teach its readers? By that
) Z4 J+ b6 e. \standard, I estimate that at least half of the peer-reviewed scientific
) m( B6 C1 T0 mpapers in Nature should be retracted. How can one convince the editors and" T( E( }+ y$ }+ ^7 J$ h( m
reviewers that their proposed theory works for every possible case? One
7 Z* c) h& P8 {, F6 a' m: H7 ycannot. One chooses to apply the theory to typical examples and to
5 \( T9 g; N- O# u6 hdemonstrate that in (hopefully) all scenarios considered, the theory works# J- f' t' q; n6 X
to a degree, and that that should warrant publication until a counterexample8 J: L. A2 O8 o! @+ `
is found. I could imagine that Callaway has a sceptical mind, which is( D- ^6 c: f4 z L3 n6 B* g2 S9 u9 ^
crucial to scientific thinking, but that would be put to better use if he7 r; z% m. F; N7 c1 M* f2 i
wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly
' u' ^4 c: q/ k; f) J; wadvanced, non-detectable drug that the Chinese have come up with in the+ z$ P* T/ v n, Z# }7 }
past 4 years (they obviously did not have it in Beijing, otherwise why not- J; W0 l; T% O* W1 R# T7 E) [, t
use it and woo the audience at home?), based on data and rational derivation
3 ~) C0 k- M) Y1 l" l- F4 C3 i" g. This article, however, can be interpreted as saying that all athletes are: M% ]6 U; C% ?$ w% G( V g. `
doping and the authorities are just not good enough to catch them. That may* F( `8 m. x- M" }( e
be true, logically, but definitely will not make the case if there is ever a; |1 Q( j( @. |3 y
hearing by the governing body for water sports, FINA, to determine if Ye( V9 ]) y2 k% c" i6 b& X. @
has doped. To ask whether it is possible to obtain a false negative in a+ ]0 H9 X: @' @6 O. n, W9 [: y
drug test looks like a rigged question to me. Of course it is possible:4 H! m9 K! V) b0 e& i4 P
other than the athlete taking a drug that the test is not designed to detect& Y; q) g" e8 D- F
, anyone who has taken quantum 101 will tell you that everything is
9 Y( c9 u, m9 w- R: \2 p1 {probabilistic in nature, and so there is a probability that the drug in an
6 l" e7 L# s2 w2 ]+ Fathlete’s system could tunnel out right at the moment of the test. A slight7 N1 u* H; d! d
chance it may be, but should we disregard all test results because of it?0 j9 L4 V# D2 H [
Let’s be practical and reasonable, and accept that the World Anti-Doping9 M2 l$ B* P; d5 i. f
agency (WADA) is competent at its job. Ye’s urine sample will be stored for
- d; M* @$ K3 R$ \( `eight years after the contest for future testing as technology advances.
' A- [8 f0 V! o; h# u1 x; U& T6 SInnocent until proven guilty, shouldn’t it be?
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Sixth, and the last point I would like to make, is that the out-of-
" n/ M' b4 W6 ^$ a7 a, m- Qcompetition drug test is already in effect, which Callaway failed to mention. @1 _3 _+ W% A9 b
. As noted in the president of WADA’s press release, drug testing for, d1 V' F2 l( H9 t0 u2 c/ E/ _8 a
Olympians began at least six months before the opening of the London
1 q8 p/ ?( v& {$ @7 O6 \" ^1 uOlympics. Furthermore, 107 athletes have been banned from this Olympics for
$ f, W" x$ c) s. j: `doping. That may be the reason that “everyone will pass at the Olympic% e5 }- y" s$ m$ t9 h! ^
games. Hardly anyone fails in competition testing” — those who did dope
1 B* u$ G! ~, N; Thave already been caught and sanctioned. Callaway is free to suggest that a
. K3 F: v0 K9 Q& }0 v7 pplayer could have doped beforehand and fooled the test at the game, but this
. Z( }' l0 s) D2 d. a8 K* S, {possibility is certainly ruled out for Ye.; U3 M7 H4 x6 {; b, h! P8 ^) }
y- Z5 n1 w5 _. p' J7 Z% |3 p5 gOver all, even though Callaway did not falsify any data, he did (
5 D0 V4 H$ I: Q0 h) W. tintentionally or not) cherry-pick data that, in my view, are far too
, J0 M5 L( U! Msuggestive to be fair and unbiased. If you want to cover a story of a
8 a3 \8 u' U0 V4 D) d0 ^3 g) |( esuspected doping from a scientific point of view, be impartial and provide
6 h' i0 u6 \; u7 a- Xall the facts for the reader to judge. You are entitled to your+ l; v+ S; r+ z8 \, o8 P6 l
interpretation of the facts, and the expression thereof in your piece,1 X5 M, X* ~/ h2 ^# `7 s9 Q
explicitly or otherwise, but showing only evidence that favours your, N+ D( K6 S v
argument is hardly good science or journalism. Such an article in a journal; r ^) J. Y3 g5 K% f
such as Nature is not an appropriate example of how scientific research or7 r# k5 s2 l9 n4 p, ^. m
reporting should be done. |
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