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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# f5 r2 V% m/ z* q4 ?. G7 \
如果是中国长大的,英语能到这种程度真是很不简单。1 S7 L! i6 g7 x: M
' ]3 y5 G0 y0 |2 C7 Y% S j, jhttp://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html4 L' C3 Y% l/ M( H: D
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FROM LAI JIANG, Department of Chemistry, University of Pennsylvania; s; R& {2 U+ x% ~9 k% `" U" A; J
X. g0 H) u4 uIt is a shame to see Nature — which nearly all scientists, including myself
3 ` S" ]- f( I% Y, regard as one of the most prestigious and influential physical-science
7 c6 |* Q( o! o. ?- V1 Fmagazines — publish a thinly veiled biased article like this. Granted, this3 _9 |" q, y1 ?/ G+ D# A- `
is not a peer-reviewed scientific article and did not go through the5 S3 S/ ?7 n. y% F8 x
scrutiny of picking referees. But to serve as a channel for the general
4 C4 s) g7 j: G, qpopulace to be in touch with and appreciate science, the authors and editors
7 w- E0 B5 O. kshould at least present the readers with facts within the proper context,
! m" n# P- b/ K9 ]. k% jwhich they blatantly failed to do.* B3 F: p$ Y8 C" S# S ?- i' p
( `0 f* E: {# g+ T: a! \8 bFirst, to identify Ye’s performance increase, Ewen Callaway compared her4 {! A6 j1 c+ a- L/ i7 z
Olympic 400-metre IM time with her performance at the World Championships in. O9 C4 r" l# y) N+ p; T
2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “! v: t' {# f1 }& M- t5 T
anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous
% U5 K$ i; K Zpersonal best was 4:33.79 at the Asian Games in 2010. This leads to an
2 A% e, W% c1 \9 U4 r( Qimprovement of 5.38 seconds. In a sporting event in which 0.1 s can be the
2 }) t7 ^9 I9 ? ]& @# k4 N, |difference between the gold and silver medal, I see no reason for 5.38 s to: b8 T6 i! o: i5 Z: ~6 ~
be treated as 7 s.
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" f8 a& V1 n! i1 G o2 OSecond, as previously pointed out, Ye is only 16 years old and her body is9 ?; [3 \& E- X+ w
still developing. Bettering oneself by 5 seconds over two years may seem8 \' Q' J. N, g- ~( l* b
impossible for an adult swimmer, but it certainly happens among youngsters.* @% s8 y( M% R6 y8 m2 U' a
An interview with Australian gold medallist Ian Thorpe revealed that his 400' O+ H, w. A! U
-metre freestyle time improved by 5 seconds between the ages of 15 and 16.
8 M; F T0 R8 oFor regular people, including Callaway, it may be hard to imagine what an" S1 C: A6 q5 w7 }6 A1 y
elite swimmer can achieve as he or she matures and undergoes scientific and
" h& s& k7 f# u y6 q! _persistent training. But jumping to the conclusion that it is “anomalous”) i# ~% Z6 l: {$ x6 F4 l
based on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.. H7 q- f( n& S- D9 R; v' {: O
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Third, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook6 Y2 s5 M( U5 \" j( u5 M( w
example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in
/ w, W3 j1 G6 V% h! L/ {the last 50 metres, but Lochte had a huge lead in the first 300 metres, so4 _# n- w9 R5 v
he chose not to push himself too hard and to conserve his energy for later. U: ?6 [" D: X1 ? W) e5 M
events (whether this conforms to the Olympic spirit and the ‘use one’s2 D/ _/ C4 G% z! W1 j, `2 w$ }8 c! Z
best efforts to win a match’ requirement that the Badminton World
/ ^1 t4 q- l2 Y0 s' }Federation recently invoked to disqualify four badminton pairs is another+ D( b7 z! b! T7 H& x
topic worth discussing, though probably not in Nature). Ye, on the other
8 m# Y, z. y6 L: n! Uhand, was trailing behind after the first 300 metres and relied on freestyle1 `9 M* g* q' ?+ E6 `. }6 K
, in which she has an edge, to win the race. Failing to mention this
' z0 j* V, H" c7 s3 d3 N {$ A9 nstrategic difference, as well as the fact that Lochte is 23.25 seconds
A8 Z+ h5 _6 T( @: w* p' L4 {faster (4:05.18) than Ye overall, creates the illusion that a woman swam" ^4 f6 p! I& F6 c3 Q
faster than the best man in the same sport, which sounds impossible. Putting. }3 d. g7 K4 ]) r; `% B8 p
aside the gender argument, I believe this is still a leading question that# E( F8 ^: Q3 o7 ~9 N- {" f7 J4 X6 h
implies to the reader that there is something fishy going on.+ c9 i% {) o3 e, E' d
4 V5 G5 u$ w7 Y mFourth is another example of cherry-picking. In the same event, there are
, x+ }5 m- |: g% b) B c; \+ A- Vfour male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93
% t( I" L9 T y7 Z& Ys) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s
+ Q% s6 G8 X# ~6 J), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns9 ]3 E- _, V! y: ^0 L& I+ f7 `
out, if we are just talking about the last 50 metres in a 400-metre IM,2 f& o5 n) i- f* l& w {
Lochter is not the example I would have used if I were the author. What kind" ~4 t2 U& x% G
of scientific rigorousness is Callaway trying to demonstrate here? Is it
- ?' G3 p5 S3 @# s3 Slogical that if Lochter is the champion, we should assume that he leads in( O# I% F1 ^) G9 x6 r9 @
every split? That would be a terrible way to teach the public how science$ ~2 o7 a0 o, b) U+ v2 R
works.
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/ H" O+ B8 m9 @# A* q2 w" i& G6 [0 s4 eFifth is the issue I oppose the most. Callaway quotes Ross Tucker and
" J% c$ D- V( g% F0 R% P |implies that a drug test cannot rule out the possibility of doping. Is this
; b3 M: a( u6 t' C Ykind of agnosticism what Nature really wants to teach its readers? By that) E5 n* _& V& u8 X, j
standard, I estimate that at least half of the peer-reviewed scientific' p; `) o" h; m( ^
papers in Nature should be retracted. How can one convince the editors and& q+ f% H/ O$ G# h$ D4 Z
reviewers that their proposed theory works for every possible case? One
0 }# m# K, m4 \1 g. B% l }cannot. One chooses to apply the theory to typical examples and to/ q ~" h% _. N# `% X: n# e
demonstrate that in (hopefully) all scenarios considered, the theory works# }/ d7 l/ f" |9 B8 l
to a degree, and that that should warrant publication until a counterexample5 M. m* d/ ]" @
is found. I could imagine that Callaway has a sceptical mind, which is* f2 N; K; L' W- W
crucial to scientific thinking, but that would be put to better use if he+ X0 f1 n6 O& f( R1 ^" U3 A T
wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly
9 o: i y" i" R w, w( J$ r' Q: Jadvanced, non-detectable drug that the Chinese have come up with in the
3 X& g5 t4 B' X2 F8 |6 {& |% Spast 4 years (they obviously did not have it in Beijing, otherwise why not$ A% i( ]# W0 M7 m' v* n' X
use it and woo the audience at home?), based on data and rational derivation
6 q0 ]0 l4 ?& v2 x/ U/ D. This article, however, can be interpreted as saying that all athletes are
' O/ l3 Y2 O5 V2 m: |; e. G$ ]0 Bdoping and the authorities are just not good enough to catch them. That may) z, c) L2 ]7 |
be true, logically, but definitely will not make the case if there is ever a9 ~% v) z- X0 U6 ~
hearing by the governing body for water sports, FINA, to determine if Ye
5 T l+ b8 l8 {$ Whas doped. To ask whether it is possible to obtain a false negative in a
) }- e1 f; W0 U4 d/ Ldrug test looks like a rigged question to me. Of course it is possible:* f% z7 K2 b# Y% X: p8 I' y" S
other than the athlete taking a drug that the test is not designed to detect. ~! [2 |) e5 w8 ~7 c
, anyone who has taken quantum 101 will tell you that everything is B! V9 d) y8 k9 C, ]# E! ^
probabilistic in nature, and so there is a probability that the drug in an
p1 x9 i3 n4 _) A$ Iathlete’s system could tunnel out right at the moment of the test. A slight- h+ D1 k( e" r- @
chance it may be, but should we disregard all test results because of it?; C: h5 l3 N% T+ Y$ Q1 b
Let’s be practical and reasonable, and accept that the World Anti-Doping
" S2 w z/ e& x% H _& R% }agency (WADA) is competent at its job. Ye’s urine sample will be stored for- H' z4 z6 G z
eight years after the contest for future testing as technology advances.
! T2 P( U1 v, I' i, I! f; Y9 eInnocent until proven guilty, shouldn’t it be?
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/ S3 {( @9 i$ |Sixth, and the last point I would like to make, is that the out-of-
- j8 V' w3 G7 ?3 ]4 [- ^competition drug test is already in effect, which Callaway failed to mention/ F3 d9 c% @8 H
. As noted in the president of WADA’s press release, drug testing for
! D# q( m \' i6 [# [8 xOlympians began at least six months before the opening of the London! ?) t3 R: _* ^+ E1 V' q+ S1 o2 w
Olympics. Furthermore, 107 athletes have been banned from this Olympics for
' ]- A% w& v2 n- [% {; b) zdoping. That may be the reason that “everyone will pass at the Olympic
2 S1 G% B0 B) l; l: xgames. Hardly anyone fails in competition testing” — those who did dope, B) m& I% T# w0 p# R0 ?* d4 X
have already been caught and sanctioned. Callaway is free to suggest that a7 h" }& A3 Q% O2 W0 L7 ^8 I6 G$ O
player could have doped beforehand and fooled the test at the game, but this
9 x3 J/ R% h, @! c+ k# zpossibility is certainly ruled out for Ye.
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: s5 _; c- ^, lOver all, even though Callaway did not falsify any data, he did (
) f) O" X) g1 Q* Pintentionally or not) cherry-pick data that, in my view, are far too( R0 i; w/ K4 ^0 w( F; f* ^9 H
suggestive to be fair and unbiased. If you want to cover a story of a
2 U3 c7 K( |9 s A# `( U# A) F- w8 i6 T9 d3 Qsuspected doping from a scientific point of view, be impartial and provide
/ Z3 r- B" J* l9 xall the facts for the reader to judge. You are entitled to your
" X8 P: [: o0 Ointerpretation of the facts, and the expression thereof in your piece,; |# Q4 D4 j$ w. [% _ j3 F) I3 g8 ?
explicitly or otherwise, but showing only evidence that favours your
! d. o6 |3 Z2 |% n5 `0 c) ~argument is hardly good science or journalism. Such an article in a journal2 W! G+ \. p- K6 m# j
such as Nature is not an appropriate example of how scientific research or/ z- V! V* U2 f7 H! X
reporting should be done. |
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