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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
" e7 `; Q. j* T; [* A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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8 p3 b8 I. H5 F% I; yhttp://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html
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' c/ [! t) [- G5 x: K1 b- z7 l+ h* vFROM LAI JIANG, Department of Chemistry, University of Pennsylvania
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7 i! Z, B, |& |: wIt is a shame to see Nature — which nearly all scientists, including myself9 n, L/ r0 { z- y; |7 q5 E
, regard as one of the most prestigious and influential physical-science
3 b2 S8 o: s- f) O" Umagazines — publish a thinly veiled biased article like this. Granted, this
+ F% W4 d. `+ `is not a peer-reviewed scientific article and did not go through the2 f' [5 t0 R$ ?- ~9 {8 r0 g2 t
scrutiny of picking referees. But to serve as a channel for the general: {1 }6 W: X) k' m) T
populace to be in touch with and appreciate science, the authors and editors
- C) Y3 w! Q8 r2 m5 L3 @5 {should at least present the readers with facts within the proper context,
! m. e0 L. B4 L* @; p- gwhich they blatantly failed to do.
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/ N2 a4 A& _7 i; K, R: ~First, to identify Ye’s performance increase, Ewen Callaway compared her4 b: n7 H' |+ x# k* p0 e
Olympic 400-metre IM time with her performance at the World Championships in+ ?8 F2 j! [! Z, h
2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “
+ {$ i& n4 f2 k, `) ~( o6 _anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous- o) i% \' D$ W% z4 K% u) o
personal best was 4:33.79 at the Asian Games in 2010. This leads to an
6 t6 Z" @1 Q; \+ C# w( ximprovement of 5.38 seconds. In a sporting event in which 0.1 s can be the
. C+ M/ J. @0 Z' x$ H& S& Wdifference between the gold and silver medal, I see no reason for 5.38 s to& z8 }* K& n) f% k% V
be treated as 7 s.- L" Q% d/ Y3 {& o0 W8 U! o
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Second, as previously pointed out, Ye is only 16 years old and her body is
( e$ r. i' ^5 Y" M; R- rstill developing. Bettering oneself by 5 seconds over two years may seem" d& \. b9 r" i6 g* _# C
impossible for an adult swimmer, but it certainly happens among youngsters.
0 N) a9 e0 D( [% _' l; DAn interview with Australian gold medallist Ian Thorpe revealed that his 400* |; ?7 N, E) ^; d
-metre freestyle time improved by 5 seconds between the ages of 15 and 16.
8 [5 F! P% c3 z6 j. f' ?# RFor regular people, including Callaway, it may be hard to imagine what an" w6 _) \5 `! i! [+ }: Y! l
elite swimmer can achieve as he or she matures and undergoes scientific and1 J# F. z* w9 d' I0 `
persistent training. But jumping to the conclusion that it is “anomalous”. v5 b4 X9 t" g. g
based on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.
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! o. |! H+ \: M. r$ tThird, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook6 I5 a" @' l0 ]7 U5 `# x6 D& e
example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in/ u- a7 c# ]' w, G4 R' b
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so# \9 Y6 o6 q) G( @4 M
he chose not to push himself too hard and to conserve his energy for later7 v- u' [/ [! @. @% _
events (whether this conforms to the Olympic spirit and the ‘use one’s
* @3 Q2 V+ w. k3 |7 V2 \ Bbest efforts to win a match’ requirement that the Badminton World
0 B, x1 ` j# {* U+ D0 O/ rFederation recently invoked to disqualify four badminton pairs is another
; F7 q3 o% g8 h& l. |+ Y5 Itopic worth discussing, though probably not in Nature). Ye, on the other
4 _2 D% E6 s1 A+ t: z+ Khand, was trailing behind after the first 300 metres and relied on freestyle
' D8 H B2 J- |" k5 y+ a2 b, in which she has an edge, to win the race. Failing to mention this& i. s+ K9 r9 g3 i3 q3 v4 b3 l
strategic difference, as well as the fact that Lochte is 23.25 seconds% `0 a6 O* H0 t4 J0 p
faster (4:05.18) than Ye overall, creates the illusion that a woman swam% M; l) C# @1 c1 L: J b
faster than the best man in the same sport, which sounds impossible. Putting
. p8 Z5 J" V! a+ taside the gender argument, I believe this is still a leading question that
k* v/ v Q$ M7 Q1 Ximplies 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 are- f) V; a/ a9 y. J/ Y, d
four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93
6 s3 A/ U5 X% c# j( zs) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s+ F, ~: ^9 S6 b/ a, G5 E& ] V% Y$ X
), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns9 N& h3 \8 L/ N+ ?, A
out, if we are just talking about the last 50 metres in a 400-metre IM,
- @% ]( z8 y& O6 fLochter is not the example I would have used if I were the author. What kind
5 J4 \0 ^' y6 y W3 c: Mof scientific rigorousness is Callaway trying to demonstrate here? Is it( ?0 ^/ ]8 x" e
logical that if Lochter is the champion, we should assume that he leads in" M1 V4 n8 g* }) f9 X
every split? That would be a terrible way to teach the public how science
' j$ @1 B3 t' ]7 dworks." w; [6 w- o0 X1 K
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Fifth is the issue I oppose the most. Callaway quotes Ross Tucker and% |& \: W% V; ~7 D d H3 t
implies that a drug test cannot rule out the possibility of doping. Is this
3 E# M9 t9 A$ C% n9 T+ Tkind of agnosticism what Nature really wants to teach its readers? By that% a+ B" s7 p! O
standard, I estimate that at least half of the peer-reviewed scientific4 a2 @; O7 n6 W: N
papers in Nature should be retracted. How can one convince the editors and* X9 J% {+ x" b
reviewers that their proposed theory works for every possible case? One) K5 i D. d! l4 c- M
cannot. One chooses to apply the theory to typical examples and to4 Y* s5 z! t9 y. I, V7 a5 k4 \
demonstrate that in (hopefully) all scenarios considered, the theory works
& s+ ?& V( C9 B/ ito a degree, and that that should warrant publication until a counterexample4 E6 G: B# s/ P( u
is found. I could imagine that Callaway has a sceptical mind, which is
- D5 m0 T, P9 f- S R3 N* ecrucial to scientific thinking, but that would be put to better use if he% ~. X3 ]) d n& |& [
wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly. n1 q) L9 t% c# ~5 t
advanced, non-detectable drug that the Chinese have come up with in the
! Q: G7 Q5 v$ z+ J# e6 Vpast 4 years (they obviously did not have it in Beijing, otherwise why not
# c' @& N* G) L1 x4 cuse it and woo the audience at home?), based on data and rational derivation
- B' @ {/ Y: v7 m9 h1 {. This article, however, can be interpreted as saying that all athletes are
* V& q+ i) d4 ^5 N9 h P) }/ ?doping and the authorities are just not good enough to catch them. That may
$ R* r' m1 B, v# J; t+ [be true, logically, but definitely will not make the case if there is ever a
' O& z, z" s) u3 \2 _" bhearing by the governing body for water sports, FINA, to determine if Ye
3 K1 {) v4 L. d5 l3 Rhas doped. To ask whether it is possible to obtain a false negative in a
! o7 w) H4 o. o4 ^1 b3 i% \4 Wdrug test looks like a rigged question to me. Of course it is possible:
; l7 f W' R1 n: iother than the athlete taking a drug that the test is not designed to detect) o" D% `; H: S) t, ^
, anyone who has taken quantum 101 will tell you that everything is
2 K8 w" _/ A! i6 W/ uprobabilistic in nature, and so there is a probability that the drug in an
' E) K0 e% j7 I, [ I" v* @( hathlete’s system could tunnel out right at the moment of the test. A slight
4 s8 d$ \; l2 ichance it may be, but should we disregard all test results because of it?
% j6 Q0 S( V' S0 KLet’s be practical and reasonable, and accept that the World Anti-Doping
% w \ s& C9 B$ W% y" } ]; Z6 E: Dagency (WADA) is competent at its job. Ye’s urine sample will be stored for+ v) ~0 A8 Z7 G b% H
eight years after the contest for future testing as technology advances.3 \2 Q( ? }1 T5 w
Innocent until proven guilty, shouldn’t it be?! q/ t0 j( t$ x h) P
) y @& U* c. y& iSixth, and the last point I would like to make, is that the out-of-
/ O$ d* @5 k4 O! j8 B' f" Jcompetition drug test is already in effect, which Callaway failed to mention
/ B( @- Z$ c+ G' ^0 m: y. As noted in the president of WADA’s press release, drug testing for5 r9 U& x1 P: n8 C8 k1 A5 o/ v( I
Olympians began at least six months before the opening of the London$ c5 v4 j; d2 Z$ l
Olympics. Furthermore, 107 athletes have been banned from this Olympics for3 C1 j, C' f G. c
doping. That may be the reason that “everyone will pass at the Olympic6 I9 E# ^ M$ N- t) Y$ h+ M. k
games. Hardly anyone fails in competition testing” — those who did dope9 ~& U/ _6 [( k, n( q5 M% S$ |
have already been caught and sanctioned. Callaway is free to suggest that a
) P: P- ]+ B2 i8 Splayer could have doped beforehand and fooled the test at the game, but this; d3 w) R! b' u, I$ Q
possibility is certainly ruled out for Ye.
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Over all, even though Callaway did not falsify any data, he did (9 c9 |* G$ `$ E2 W7 n3 L
intentionally or not) cherry-pick data that, in my view, are far too
) Q0 A2 p3 M x' Y M5 s, r, usuggestive to be fair and unbiased. If you want to cover a story of a
3 f. k3 I. ?3 j8 V* g' Ususpected doping from a scientific point of view, be impartial and provide
p6 Q d8 O, ]all the facts for the reader to judge. You are entitled to your
( m! S4 p6 j; ^9 E4 cinterpretation of the facts, and the expression thereof in your piece,
# a* w2 w6 L9 a7 c2 zexplicitly or otherwise, but showing only evidence that favours your
3 k6 a: V6 n! O b: }3 ^: Margument is hardly good science or journalism. Such an article in a journal
9 ?$ l* I, c+ _5 z& Msuch as Nature is not an appropriate example of how scientific research or
& Z& B X E6 m/ \reporting should be done. |
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