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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
$ @$ r8 b. ^& Y+ d( J: z9 g如果是中国长大的,英语能到这种程度真是很不简单。% {/ N% Z0 r4 q- \& x/ J
- e3 s9 U w; Y& q: m* qhttp://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html( A! r- w0 d8 D. i' n+ u$ Q) e
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FROM LAI JIANG, Department of Chemistry, University of Pennsylvania
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It is a shame to see Nature — which nearly all scientists, including myself
0 r4 ~% Y5 [4 I* X" [# G9 `, regard as one of the most prestigious and influential physical-science( r5 t! S% ^/ T) w
magazines — publish a thinly veiled biased article like this. Granted, this4 K9 g# P9 w6 s3 p3 g! T$ X+ B
is not a peer-reviewed scientific article and did not go through the) f: P3 e' i( ~" ~% t
scrutiny of picking referees. But to serve as a channel for the general$ b- z* D( p! g# Z! A
populace to be in touch with and appreciate science, the authors and editors
8 @) S9 z( X4 \5 @6 ^7 r3 Ishould at least present the readers with facts within the proper context,/ J$ {& J& N- l( n6 H
which they blatantly failed to do.* `0 ?$ G3 R! l
9 J* t7 p, U& I1 @First, to identify Ye’s performance increase, Ewen Callaway compared her V6 C4 S8 [6 W
Olympic 400-metre IM time with her performance at the World Championships in
. }4 `. o) `+ f8 G3 `7 `, k2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “# @2 k4 w8 r4 d: {# M5 j* v' T
anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous) l) c1 S1 ]1 V( a
personal best was 4:33.79 at the Asian Games in 2010. This leads to an
, c' F d; Y" Q' }6 iimprovement of 5.38 seconds. In a sporting event in which 0.1 s can be the
5 Y; F" z# |" T. C4 w) g+ C# j: B7 @4 Odifference between the gold and silver medal, I see no reason for 5.38 s to
- D" N O. ]7 v) {7 Mbe treated as 7 s.
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# C0 `# t" T/ [Second, as previously pointed out, Ye is only 16 years old and her body is
! n' {' O! I+ H! x9 wstill developing. Bettering oneself by 5 seconds over two years may seem
. i/ d' \' s3 z& n, `impossible for an adult swimmer, but it certainly happens among youngsters." U9 o( A# y! ?
An interview with Australian gold medallist Ian Thorpe revealed that his 400
! t Y# r R6 z-metre freestyle time improved by 5 seconds between the ages of 15 and 16.
% P- s/ A- T. T; _- h( XFor regular people, including Callaway, it may be hard to imagine what an
* p0 j3 V- P7 J* `3 `) }4 Celite swimmer can achieve as he or she matures and undergoes scientific and
7 S4 w- m2 F" s& }) Y2 w9 @persistent training. But jumping to the conclusion that it is “anomalous”
" V" H% ?) Z1 F/ j7 k, X u+ sbased on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.
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Third, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook9 s5 D, l; Q- D+ X5 U8 x$ z* s
example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in9 M& V/ P y1 k' Y
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so
1 r4 d8 c7 \: c( Che chose not to push himself too hard and to conserve his energy for later7 d6 R. [/ T2 u6 i: p v% ~
events (whether this conforms to the Olympic spirit and the ‘use one’s- S9 f+ a) X/ j7 L" D; U% z
best efforts to win a match’ requirement that the Badminton World6 z# _/ a% h' [8 }% e
Federation recently invoked to disqualify four badminton pairs is another) W! Y2 [) d. c8 w( P
topic worth discussing, though probably not in Nature). Ye, on the other$ E& c- m) a1 M) m1 ^# [
hand, was trailing behind after the first 300 metres and relied on freestyle
' Y' z" ?: l: w r8 ~/ i$ Y3 ?6 e, S, in which she has an edge, to win the race. Failing to mention this
6 V9 i! V0 c7 R7 [$ N9 Ystrategic difference, as well as the fact that Lochte is 23.25 seconds3 e9 n# m; o& M- V
faster (4:05.18) than Ye overall, creates the illusion that a woman swam
5 F9 y% v1 {$ k. q. `faster than the best man in the same sport, which sounds impossible. Putting
9 g( R2 ~4 ?* x& [/ H6 Vaside the gender argument, I believe this is still a leading question that: P* H# l& D# u; F: `
implies to the reader that there is something fishy going on.
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Fourth is another example of cherry-picking. In the same event, there are3 c* C1 z+ u6 O0 v. h
four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93
. ]7 @) Y5 @2 \2 p, Q9 xs) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s N$ Q; S3 r4 m% Z
), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns
3 A& Y: w. M8 q. [' {4 ]1 o; ?& @out, if we are just talking about the last 50 metres in a 400-metre IM, v3 _1 b. ^1 H- S" t
Lochter is not the example I would have used if I were the author. What kind$ n- z2 B* h& b% z: j: k _* Y5 v0 G
of scientific rigorousness is Callaway trying to demonstrate here? Is it
1 c2 j6 S0 ]# z( Tlogical that if Lochter is the champion, we should assume that he leads in
7 }2 ]4 z8 a, {7 ?2 M3 f! Xevery split? That would be a terrible way to teach the public how science
' A+ M% U( ]8 \/ T* Xworks.2 W% U# Y: I8 }3 D" Z9 _
4 l/ U( ^% Q n1 n8 K* g3 EFifth is the issue I oppose the most. Callaway quotes Ross Tucker and3 ~6 ~/ F, M' R) T' T: y$ Z
implies that a drug test cannot rule out the possibility of doping. Is this
4 f7 _, j5 j+ H: Q8 D$ i3 K" ]kind of agnosticism what Nature really wants to teach its readers? By that( ~1 k+ R2 _4 `$ N6 `/ E/ p
standard, I estimate that at least half of the peer-reviewed scientific
0 ^% [3 |4 f3 p& z- d9 ~( Apapers in Nature should be retracted. How can one convince the editors and; \; {: j7 a. N5 ?. E: m
reviewers that their proposed theory works for every possible case? One
; W$ f+ ?0 }" _' b+ lcannot. One chooses to apply the theory to typical examples and to
5 Y2 |+ `4 D! q$ H6 U3 D# kdemonstrate that in (hopefully) all scenarios considered, the theory works
* h& I% l$ i0 s) F) d4 A4 L* Bto a degree, and that that should warrant publication until a counterexample+ g7 y6 g' Y. f B0 R
is found. I could imagine that Callaway has a sceptical mind, which is# V' Z T$ z" F
crucial to scientific thinking, but that would be put to better use if he
; w5 `' o4 b8 T; I( E, g9 Jwrote a peer-reviewed paper that discussed the odds of Ye doping on a highly
2 v/ g i7 a7 x9 g3 K* y" aadvanced, non-detectable drug that the Chinese have come up with in the& }) S( m2 \3 G7 d: e
past 4 years (they obviously did not have it in Beijing, otherwise why not! E) \: x) V0 f( ` g- y
use it and woo the audience at home?), based on data and rational derivation. J$ s, J f# z9 c
. This article, however, can be interpreted as saying that all athletes are
3 Y- R5 ?' {9 [. c; ?$ B ldoping and the authorities are just not good enough to catch them. That may
- v n. o' Z5 H: d" g9 M+ h, bbe true, logically, but definitely will not make the case if there is ever a) ~8 j2 G- u& F) r/ W6 J+ `
hearing by the governing body for water sports, FINA, to determine if Ye% J( r, `6 `. B( w# b5 c
has doped. To ask whether it is possible to obtain a false negative in a a" j3 M7 m( }
drug test looks like a rigged question to me. Of course it is possible:; L8 Q9 ~" B# E6 z
other than the athlete taking a drug that the test is not designed to detect) _+ S7 Q) O* W" m
, anyone who has taken quantum 101 will tell you that everything is
. d2 V' w, P) [. m) `probabilistic in nature, and so there is a probability that the drug in an
4 l; G, I- ^( e* A0 L. u* m2 ~athlete’s system could tunnel out right at the moment of the test. A slight
" H" n0 L, g$ tchance it may be, but should we disregard all test results because of it?; z: X. Y/ P* V$ W# Y
Let’s be practical and reasonable, and accept that the World Anti-Doping# M6 `) b8 P4 A/ z, a" y% e9 U
agency (WADA) is competent at its job. Ye’s urine sample will be stored for
" X- l8 e, w$ H( g1 U# @0 ]eight years after the contest for future testing as technology advances.% M6 m( C: m8 D
Innocent 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-
4 F3 X6 `4 @: n1 G( z- f+ N3 k Qcompetition drug test is already in effect, which Callaway failed to mention* j7 k+ A! H8 o$ q" ~' O2 y% t5 G1 P
. As noted in the president of WADA’s press release, drug testing for: v0 S- F: z" e- g$ ]
Olympians began at least six months before the opening of the London
: G% f) d% i( ?+ aOlympics. Furthermore, 107 athletes have been banned from this Olympics for2 ? Q+ ?# p' W8 y' X. x
doping. That may be the reason that “everyone will pass at the Olympic
# f/ Y7 ?% M! o1 J! w* y6 n0 Lgames. Hardly anyone fails in competition testing” — those who did dope
! S2 F: i3 g4 k0 y& xhave already been caught and sanctioned. Callaway is free to suggest that a
8 N: A0 l2 i* O$ jplayer could have doped beforehand and fooled the test at the game, but this
/ O* P7 M! X1 W( P5 spossibility is certainly ruled out for Ye.
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$ Y4 `! e: R3 v, kOver all, even though Callaway did not falsify any data, he did (
$ J$ }" x1 c, g, |9 I* dintentionally or not) cherry-pick data that, in my view, are far too
) p8 l v/ F& c2 K0 w# T& J- x2 ]suggestive to be fair and unbiased. If you want to cover a story of a
5 N7 ^5 S' i- f$ U5 f0 Ysuspected doping from a scientific point of view, be impartial and provide* j( [6 ~' ~7 {
all the facts for the reader to judge. You are entitled to your7 {7 f6 Z: ?( ^' p! o
interpretation of the facts, and the expression thereof in your piece,6 w- j2 y3 K) W4 [3 {/ ?
explicitly or otherwise, but showing only evidence that favours your
) L" {( k9 \/ m) o2 |9 n) Zargument is hardly good science or journalism. Such an article in a journal5 `# ?& p8 _* W+ L3 m
such as Nature is not an appropriate example of how scientific research or0 a4 u2 u9 c; q# W
reporting should be done. |
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