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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, p9 U8 I* E1 s2 ~, [* v* `2 {+ C0 Y+ \
如果是中国长大的,英语能到这种程度真是很不简单。# q. T% U' N$ \. G8 s
, [2 X: r. c" }http://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html
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8 t$ e r# k- _* g, L' C- E1 [FROM LAI JIANG, Department of Chemistry, University of Pennsylvania8 {" j E8 K/ A4 M# N0 Z: c
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It is a shame to see Nature — which nearly all scientists, including myself
4 R9 B. i' ?" A. [( M$ G, regard as one of the most prestigious and influential physical-science4 b; Q9 Y, D% c+ s/ Q
magazines — publish a thinly veiled biased article like this. Granted, this& d ?: N! }, \: k' i' K5 Q- u; L) T
is not a peer-reviewed scientific article and did not go through the
: p! O1 I, g2 ]scrutiny of picking referees. But to serve as a channel for the general3 g( X! n4 Z. Y% b4 @7 v
populace to be in touch with and appreciate science, the authors and editors
* U, {3 W, j2 oshould at least present the readers with facts within the proper context,
. v& b% c+ V* vwhich they blatantly failed to do.
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First, to identify Ye’s performance increase, Ewen Callaway compared her
, y2 ~: R4 ^) A( N" ?, A; lOlympic 400-metre IM time with her performance at the World Championships in3 K8 B9 @5 u' e+ ]- x$ m
2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “4 H# e( ]0 |! V! M
anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous
" U& B2 Q7 C0 q* O4 M( Q1 Kpersonal best was 4:33.79 at the Asian Games in 2010. This leads to an
, G6 t g6 r, iimprovement of 5.38 seconds. In a sporting event in which 0.1 s can be the/ ~' j7 z& p# h
difference between the gold and silver medal, I see no reason for 5.38 s to9 }4 f2 \& @% i# ]4 O1 k$ T
be treated as 7 s.
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3 k( r$ _9 m. `/ \: kSecond, as previously pointed out, Ye is only 16 years old and her body is' x; n) B# S- j& }8 h
still developing. Bettering oneself by 5 seconds over two years may seem% o0 E3 k( T9 C! i* P% ~8 w/ _
impossible for an adult swimmer, but it certainly happens among youngsters.0 M m; C4 C- i/ O" x5 L; o
An interview with Australian gold medallist Ian Thorpe revealed that his 400; Z3 z6 A6 m* |3 v6 u* D, ^
-metre freestyle time improved by 5 seconds between the ages of 15 and 16.2 g0 d* g$ r$ X% s
For regular people, including Callaway, it may be hard to imagine what an
- I( K; ]+ j4 W* p9 Delite swimmer can achieve as he or she matures and undergoes scientific and2 ~4 m% [' ?9 m' C
persistent training. But jumping to the conclusion that it is “anomalous”8 S. S ^3 x* l4 v2 {; `
based on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.
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) M9 b* x! _5 w8 F3 Q% p eThird, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook# }, `- S% D( R, r7 z* B6 L+ u, S
example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in
0 V& B8 Z( P0 v0 m$ ]the last 50 metres, but Lochte had a huge lead in the first 300 metres, so
' Z( Z& L) L6 Q) T/ fhe chose not to push himself too hard and to conserve his energy for later" a4 e& M% Q8 e T- C- n/ Y
events (whether this conforms to the Olympic spirit and the ‘use one’s
- m% u1 z. ^- n2 m' Mbest efforts to win a match’ requirement that the Badminton World) }$ E7 k2 J4 u- |" a
Federation recently invoked to disqualify four badminton pairs is another
+ X- H1 ^" {* h2 E8 U5 C; r: ~topic worth discussing, though probably not in Nature). Ye, on the other
7 G$ `- N9 e# e% @/ {hand, was trailing behind after the first 300 metres and relied on freestyle7 k. y' V) K0 M
, in which she has an edge, to win the race. Failing to mention this! U8 @! h( P5 b* K8 U$ c
strategic difference, as well as the fact that Lochte is 23.25 seconds
0 _3 ?7 B; b: M; Efaster (4:05.18) than Ye overall, creates the illusion that a woman swam
0 d2 l% c4 v; d% Qfaster than the best man in the same sport, which sounds impossible. Putting
+ L/ D- E9 N5 `* g' s# Maside the gender argument, I believe this is still a leading question that
3 P- v$ u# p- F7 Limplies to the reader that there is something fishy going on.1 ~! `8 q1 C) y. b' L, z2 N
{- g2 U! _, f: ], ?Fourth is another example of cherry-picking. In the same event, there are
' ^+ r$ | X/ _+ K3 tfour male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93" @* l3 t1 W1 j* j/ O/ y
s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s* i5 o9 a" w, `# ^, a: r0 \
), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns
P' j. C- ]" Nout, if we are just talking about the last 50 metres in a 400-metre IM,& X6 Y {/ V. ^1 X' i) ?
Lochter is not the example I would have used if I were the author. What kind
A V" h; f% ^+ L/ R# cof scientific rigorousness is Callaway trying to demonstrate here? Is it* y6 o+ Z+ @" f# Q8 G
logical that if Lochter is the champion, we should assume that he leads in
$ Z2 [/ Y" d% ?% n2 ?0 @every split? That would be a terrible way to teach the public how science
8 c/ Y% s: l/ Dworks.
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Fifth is the issue I oppose the most. Callaway quotes Ross Tucker and
; i, i9 S. v+ k7 e9 y( w% timplies that a drug test cannot rule out the possibility of doping. Is this
7 ?9 Y; j6 Z, jkind of agnosticism what Nature really wants to teach its readers? By that
; }# A" L) \6 g! ^4 w, t) z qstandard, I estimate that at least half of the peer-reviewed scientific# f6 O! Z* B2 O, j
papers in Nature should be retracted. How can one convince the editors and
) T: g' H1 Z9 P9 H1 ]" Y; m: Qreviewers that their proposed theory works for every possible case? One* l- X) v7 T+ k' c2 s
cannot. One chooses to apply the theory to typical examples and to2 q% u3 c E5 l, c! O; b
demonstrate that in (hopefully) all scenarios considered, the theory works
$ G. J {- z8 I& w; H/ h3 xto a degree, and that that should warrant publication until a counterexample
6 V7 u6 J O5 J V" F% U& Qis found. I could imagine that Callaway has a sceptical mind, which is
4 }( d. t; i3 ]! f. Rcrucial to scientific thinking, but that would be put to better use if he
V% s8 Y" }! o1 F, H& zwrote a peer-reviewed paper that discussed the odds of Ye doping on a highly( |9 G8 {) h& W" H
advanced, non-detectable drug that the Chinese have come up with in the# ~" Y, S( O3 |' `. H$ q! T% D, M
past 4 years (they obviously did not have it in Beijing, otherwise why not9 l# x$ D( J3 F3 b' E
use it and woo the audience at home?), based on data and rational derivation7 R! M- R- I9 |6 V/ ]7 ~* R; d
. This article, however, can be interpreted as saying that all athletes are
% w1 _. Z: O) p2 n/ bdoping and the authorities are just not good enough to catch them. That may
2 h7 p* e- v- N& H* y' I& Mbe true, logically, but definitely will not make the case if there is ever a0 y5 E4 N$ O, E; Q( ^* K! @2 W) \
hearing by the governing body for water sports, FINA, to determine if Ye
. B) H* {. z- x7 S0 ] P: thas doped. To ask whether it is possible to obtain a false negative in a
# I( t! f7 X: h. Odrug test looks like a rigged question to me. Of course it is possible:) M3 T# R% s" @+ m7 i; a
other than the athlete taking a drug that the test is not designed to detect
9 R3 ]4 f D# S5 t8 f) C- [. o- ?, anyone who has taken quantum 101 will tell you that everything is, |: x8 }& }- d& \
probabilistic in nature, and so there is a probability that the drug in an9 S) v2 i9 @: \' ^& k u0 H
athlete’s system could tunnel out right at the moment of the test. A slight9 y; `# w- T3 }4 o/ [5 h5 L
chance it may be, but should we disregard all test results because of it?' Z {9 D- I+ O# X9 J5 T- P" W
Let’s be practical and reasonable, and accept that the World Anti-Doping: |0 k1 y3 {+ R9 w. v7 `
agency (WADA) is competent at its job. Ye’s urine sample will be stored for
& _+ e( ~+ Y: W6 G4 {4 ~eight years after the contest for future testing as technology advances.4 R. P( v) `! M0 a: }5 j
Innocent until proven guilty, shouldn’t it be?% L q9 ?0 T! I8 I3 B% }; R
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Sixth, and the last point I would like to make, is that the out-of-
?3 n w8 G2 l; w3 a: c' Ocompetition drug test is already in effect, which Callaway failed to mention
$ m/ o; y2 _6 `) ]. As noted in the president of WADA’s press release, drug testing for
3 x5 W3 A. o1 v" m9 T' JOlympians began at least six months before the opening of the London2 {, N$ v# `5 Y: Q
Olympics. Furthermore, 107 athletes have been banned from this Olympics for5 g0 K; K, Q* ^5 U3 v
doping. That may be the reason that “everyone will pass at the Olympic: p/ y3 r: u! r( B3 Q ^ R9 [
games. Hardly anyone fails in competition testing” — those who did dope
" M9 I" ~, C( Qhave already been caught and sanctioned. Callaway is free to suggest that a b [. S% |' t! M/ j
player could have doped beforehand and fooled the test at the game, but this" M r* P$ z+ q/ J7 C* J$ z
possibility is certainly ruled out for Ye.; b7 F! ~2 t' ~2 L# \* g
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Over all, even though Callaway did not falsify any data, he did (0 u! Y, |( ~% W! y; @5 l
intentionally or not) cherry-pick data that, in my view, are far too% I, r- H% [5 d
suggestive to be fair and unbiased. If you want to cover a story of a
, z( ]& X2 v7 l7 isuspected doping from a scientific point of view, be impartial and provide
% U& V1 i8 Q& ?" ?: v, Uall the facts for the reader to judge. You are entitled to your
O, D- c, A- N& S. dinterpretation of the facts, and the expression thereof in your piece,0 g7 o9 [$ \5 {) ~9 g) ?. L$ E
explicitly or otherwise, but showing only evidence that favours your+ w( L% f- r; o g0 N$ R. m
argument is hardly good science or journalism. Such an article in a journal
! x& R' Y2 p) Nsuch as Nature is not an appropriate example of how scientific research or8 N' A% ]6 h4 C2 q% h
reporting should be done. |
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