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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
. Y1 A f* b. W3 U. a' m8 \; K6 z如果是中国长大的,英语能到这种程度真是很不简单。6 O$ s Z( f8 i! ]
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http://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html
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FROM LAI JIANG, Department of Chemistry, University of Pennsylvania& j$ g. s# F* J4 p/ X' R: J
8 Y+ r( _9 t+ G, e) KIt is a shame to see Nature — which nearly all scientists, including myself
! N3 M& a; X, F- G/ l9 ~6 W4 I, regard as one of the most prestigious and influential physical-science, |# e7 O& K# _
magazines — publish a thinly veiled biased article like this. Granted, this
8 h7 t- \/ T) s# Q. iis not a peer-reviewed scientific article and did not go through the0 v( V+ {( [" P! ?5 X# T
scrutiny of picking referees. But to serve as a channel for the general
) C4 C# {! W9 [populace to be in touch with and appreciate science, the authors and editors
# p- E! h7 f; ]should at least present the readers with facts within the proper context,: Y" N2 e7 z# n2 _; ]" w
which they blatantly failed to do.
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$ H1 K) G* i5 v5 CFirst, to identify Ye’s performance increase, Ewen Callaway compared her
' ~3 U9 b- Q( _, \Olympic 400-metre IM time with her performance at the World Championships in0 A$ t0 H3 d; v. j9 A
2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “& `, g V1 X& d7 K; R2 c% w. F
anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous8 s% `$ z6 ?/ H/ N
personal best was 4:33.79 at the Asian Games in 2010. This leads to an
- Z' U8 W+ h5 b' ximprovement of 5.38 seconds. In a sporting event in which 0.1 s can be the4 l6 u+ ?5 |& T9 D
difference between the gold and silver medal, I see no reason for 5.38 s to2 {2 e% v- V9 _- H& c4 P
be treated as 7 s.
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Second, as previously pointed out, Ye is only 16 years old and her body is
0 |) K8 c3 R7 b- bstill developing. Bettering oneself by 5 seconds over two years may seem: a/ q) [1 p S/ u
impossible for an adult swimmer, but it certainly happens among youngsters.+ Z. @/ G# m8 J L, t6 z! ~
An interview with Australian gold medallist Ian Thorpe revealed that his 400, j6 x9 B8 g+ v+ x2 h2 W
-metre freestyle time improved by 5 seconds between the ages of 15 and 16.
$ p& O: o* }# w8 r, pFor regular people, including Callaway, it may be hard to imagine what an* {- s w/ Z* q( T( A9 d5 H
elite swimmer can achieve as he or she matures and undergoes scientific and3 y1 [3 T6 v$ a: {
persistent training. But jumping to the conclusion that it is “anomalous” }7 @ e+ Y% m4 T
based on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.& M1 \9 o0 v5 `# \9 r! x
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Third, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook8 ]' w7 r7 L4 x8 K
example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in7 E' `3 P( ^4 _$ H* K8 c2 c
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so- h. K/ v4 h1 T
he chose not to push himself too hard and to conserve his energy for later# {: N2 {9 }: b$ H5 k- M, q/ d
events (whether this conforms to the Olympic spirit and the ‘use one’s% h3 R) K0 p6 |7 ]' Q3 ~" {
best efforts to win a match’ requirement that the Badminton World* T8 E# b4 ]9 G! _( ]- M+ _4 z0 T
Federation recently invoked to disqualify four badminton pairs is another( K1 a+ s" {8 D; Z8 `8 e
topic worth discussing, though probably not in Nature). Ye, on the other
' V. s3 k$ J$ B8 dhand, was trailing behind after the first 300 metres and relied on freestyle
; I4 B2 H3 ]3 |3 y- A. U: M6 F, in which she has an edge, to win the race. Failing to mention this. Y8 K2 p! F R1 Q. M, W
strategic difference, as well as the fact that Lochte is 23.25 seconds* v7 b: D# }+ Z; g4 O; m3 Z
faster (4:05.18) than Ye overall, creates the illusion that a woman swam
% M% _3 c) ~! O, B9 P6 Lfaster than the best man in the same sport, which sounds impossible. Putting
$ u9 \5 B5 O. ~7 }; g% c0 W7 ]aside the gender argument, I believe this is still a leading question that9 b* X/ K& b- J+ U6 v5 }. M
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 are9 c1 m+ I. |$ |3 a7 k, d
four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93
3 s7 e1 ^% z$ p" b) Z. ]! e3 qs) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s
0 _( ?( f! e0 x* G2 S% M4 |# U), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns
/ s0 C L6 b( E1 Wout, if we are just talking about the last 50 metres in a 400-metre IM,6 C. b% h/ _" ] Q$ ]) p
Lochter is not the example I would have used if I were the author. What kind1 R' m3 K3 o) Q" M
of scientific rigorousness is Callaway trying to demonstrate here? Is it- N7 T6 ^0 c+ l& p- Z9 N" Z
logical that if Lochter is the champion, we should assume that he leads in
$ I: t3 i7 H# b6 Z8 Yevery split? That would be a terrible way to teach the public how science
; |( {& r* R3 ]# n* {works.
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Fifth is the issue I oppose the most. Callaway quotes Ross Tucker and
) D9 i" p F7 vimplies that a drug test cannot rule out the possibility of doping. Is this3 _, Y* X. W4 B! w% K
kind of agnosticism what Nature really wants to teach its readers? By that" Z6 I: N( I& L1 M; F R
standard, I estimate that at least half of the peer-reviewed scientific
+ A l, G- j. W3 d: `papers in Nature should be retracted. How can one convince the editors and
9 G8 u0 |, \6 c* l3 \reviewers that their proposed theory works for every possible case? One& P5 ]7 F2 s$ w% Q3 ?
cannot. One chooses to apply the theory to typical examples and to L: d; b$ T/ j
demonstrate that in (hopefully) all scenarios considered, the theory works. d/ l4 q' P/ y. |( r
to a degree, and that that should warrant publication until a counterexample
4 W A" o$ C; a/ Fis found. I could imagine that Callaway has a sceptical mind, which is8 l9 t p8 b! l8 j3 N3 h9 B# M3 L9 g
crucial to scientific thinking, but that would be put to better use if he
/ H* z' e! F8 ~1 X! \5 Awrote a peer-reviewed paper that discussed the odds of Ye doping on a highly) Z# ]7 o) x; S! X2 K
advanced, non-detectable drug that the Chinese have come up with in the
1 V0 a. c) }+ A% L" ypast 4 years (they obviously did not have it in Beijing, otherwise why not6 U% k0 U) c8 j' e+ J
use it and woo the audience at home?), based on data and rational derivation- C2 k! @) r6 T ^% `" U" V3 }
. This article, however, can be interpreted as saying that all athletes are! u" X7 @# _0 L4 H$ l
doping and the authorities are just not good enough to catch them. That may1 c- S( K# e* {/ f$ `& a8 J9 ?, I
be true, logically, but definitely will not make the case if there is ever a
8 C! K# m) `6 B1 ]hearing by the governing body for water sports, FINA, to determine if Ye
! \" \* z) d- i% U& u2 A* Xhas doped. To ask whether it is possible to obtain a false negative in a3 [% t% h. `) P1 [% v( U: S2 w
drug test looks like a rigged question to me. Of course it is possible:, ?0 x; n. s8 f7 W! u2 e
other than the athlete taking a drug that the test is not designed to detect
. v( s, _, N- B. w) p! a, anyone who has taken quantum 101 will tell you that everything is- }4 E% x+ Y! G/ ^$ ?: r0 Q4 E
probabilistic in nature, and so there is a probability that the drug in an
. K( V0 f* ]+ q1 rathlete’s system could tunnel out right at the moment of the test. A slight
+ ?4 n% K+ z- W1 v+ vchance it may be, but should we disregard all test results because of it?
2 [6 n+ }2 ?) P T, ]8 \Let’s be practical and reasonable, and accept that the World Anti-Doping
' e8 X, h* F, ]; B7 V1 s! n7 u" K+ Gagency (WADA) is competent at its job. Ye’s urine sample will be stored for# Q7 F5 C1 @% C" Z
eight years after the contest for future testing as technology advances.
% d) q: ^: z: P& z- ~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-
* y, \( e! M2 V! B7 [competition drug test is already in effect, which Callaway failed to mention! }5 b1 S/ m" _& F3 L# h
. As noted in the president of WADA’s press release, drug testing for u' R+ Y# R8 X9 q3 Y# b
Olympians began at least six months before the opening of the London
: R( e) Q5 T: Z$ |, mOlympics. Furthermore, 107 athletes have been banned from this Olympics for, Q4 E# ^/ t. b- e" {% ^" N
doping. That may be the reason that “everyone will pass at the Olympic
0 d+ D( N' u O) Ygames. Hardly anyone fails in competition testing” — those who did dope* i( n) z% I% P: q+ x
have already been caught and sanctioned. Callaway is free to suggest that a. H/ L/ L; `- V/ c* Z
player could have doped beforehand and fooled the test at the game, but this8 s1 `/ J3 [! X
possibility is certainly ruled out for Ye.
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2 _ p5 _. j6 w8 N8 VOver all, even though Callaway did not falsify any data, he did (2 T% B5 O9 Q& ?5 E2 A9 Q
intentionally or not) cherry-pick data that, in my view, are far too7 ]0 b; V% g- q, l/ ?
suggestive to be fair and unbiased. If you want to cover a story of a
( @0 l* a p7 `9 b* @/ o5 s$ Psuspected doping from a scientific point of view, be impartial and provide, q4 @2 p$ a6 Q" s
all the facts for the reader to judge. You are entitled to your
: c5 l. w, a& l5 Yinterpretation of the facts, and the expression thereof in your piece,
, q0 R* P" m& k- d* K7 Lexplicitly or otherwise, but showing only evidence that favours your
2 W7 m; _' p' {argument is hardly good science or journalism. Such an article in a journal
7 ]8 ~; J0 v# Zsuch as Nature is not an appropriate example of how scientific research or( ~) [& U8 }$ a
reporting should be done. |
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