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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/ s# O7 m8 i' b: M7 \* E! A
如果是中国长大的,英语能到这种程度真是很不简单。( i7 @+ f0 I1 Z+ y8 M4 Q
& E, t6 M/ h9 e/ G$ Z7 [. rhttp://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html
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I9 b6 c! R; B) CFROM LAI JIANG, Department of Chemistry, University of Pennsylvania4 y9 \1 V7 V! D- o r
6 V& p1 g3 {2 B: z6 D6 B2 I4 {; BIt is a shame to see Nature — which nearly all scientists, including myself- i1 R& d& N: @9 L" V
, regard as one of the most prestigious and influential physical-science4 z' ~8 ]: Z7 l# N) Z
magazines — publish a thinly veiled biased article like this. Granted, this
6 O) ?1 U1 e+ t' Uis not a peer-reviewed scientific article and did not go through the
! T- B1 @4 G( V' I% Yscrutiny of picking referees. But to serve as a channel for the general6 Z. e1 H8 ?, F
populace to be in touch with and appreciate science, the authors and editors4 Z! N. h+ [7 t' m
should at least present the readers with facts within the proper context,9 M, N! j( M8 I) M O3 ?- U5 T- a
which they blatantly failed to do.
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First, to identify Ye’s performance increase, Ewen Callaway compared her
4 q9 G5 i# Y7 j9 N3 d ]3 c8 |Olympic 400-metre IM time with her performance at the World Championships in
* }5 T5 ^# ?, g) A( {+ F2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “! x2 U6 O1 H* \, L/ `5 D8 N; M% ^
anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous( S$ `0 L3 ?+ [ p0 _- j0 N, y% N2 ? I
personal best was 4:33.79 at the Asian Games in 2010. This leads to an
" t4 Z6 ]$ Q% z5 T/ ]& Q; nimprovement of 5.38 seconds. In a sporting event in which 0.1 s can be the, E! s( k7 M8 F
difference between the gold and silver medal, I see no reason for 5.38 s to/ Y! I0 h: A9 _4 `1 H
be treated as 7 s.
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Second, as previously pointed out, Ye is only 16 years old and her body is& w6 G. C) D2 u1 J b
still developing. Bettering oneself by 5 seconds over two years may seem7 H, ^& R2 c& f1 t
impossible for an adult swimmer, but it certainly happens among youngsters.1 @$ V* f) w) w6 L# Z4 Q
An interview with Australian gold medallist Ian Thorpe revealed that his 400; [6 ~2 D: ~" J* U N( y0 P) Z( A6 T
-metre freestyle time improved by 5 seconds between the ages of 15 and 16.
: G: V2 i# ]2 x, Q1 [For regular people, including Callaway, it may be hard to imagine what an
9 ]$ D& D9 @' l$ `' C2 _) ]elite swimmer can achieve as he or she matures and undergoes scientific and
% U9 D6 O( B5 K# }# v# R6 c: Ypersistent training. But jumping to the conclusion that it is “anomalous”# h. ]% I+ m& O: e
based on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.( G# e$ U2 j9 f4 [6 R, i. U* w
1 }2 X( T! y: k- T* @6 _/ i" UThird, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook
4 @8 k E: b/ C: Zexample of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in
7 C5 T5 s- t. i; R& Q. Dthe last 50 metres, but Lochte had a huge lead in the first 300 metres, so$ H& M, v H: b; N& l5 |+ Z
he chose not to push himself too hard and to conserve his energy for later
2 f: {! T: n/ I4 b1 c& Levents (whether this conforms to the Olympic spirit and the ‘use one’s: W6 B( j8 i/ w6 T
best efforts to win a match’ requirement that the Badminton World
6 i8 x1 l8 ?& I( v6 w1 @) RFederation recently invoked to disqualify four badminton pairs is another
/ L* [( ?, b( s6 }; t& m2 [7 c3 xtopic worth discussing, though probably not in Nature). Ye, on the other D2 ~, b, F7 ]" p7 L1 u, ]9 K
hand, was trailing behind after the first 300 metres and relied on freestyle
0 v8 {7 M# u1 `, in which she has an edge, to win the race. Failing to mention this
( P3 y: q2 S1 Fstrategic difference, as well as the fact that Lochte is 23.25 seconds
2 t) V6 y# h* k. E/ f5 x4 P( L+ dfaster (4:05.18) than Ye overall, creates the illusion that a woman swam
3 a0 S/ Y. G7 u/ Z! X* t Z4 Vfaster than the best man in the same sport, which sounds impossible. Putting
2 `. f# H9 a2 }4 Maside the gender argument, I believe this is still a leading question that
9 G$ \" x0 U/ c0 s& N' Cimplies to the reader that there is something fishy going on.
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7 Q/ ^# v: q1 S- B1 QFourth is another example of cherry-picking. In the same event, there are) P. d: h- P+ _$ y3 g* f
four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93
; y! ` d2 d: \8 ^s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s
# T( n5 Y# t. w* { u# m8 T), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns
) s$ J- k0 }! u+ Rout, if we are just talking about the last 50 metres in a 400-metre IM,
8 v2 R m6 X7 E3 XLochter is not the example I would have used if I were the author. What kind
3 {/ s0 [! E* k' G( A# O* {! {' B- Uof scientific rigorousness is Callaway trying to demonstrate here? Is it' z* Z# B- Q3 i! c$ S
logical that if Lochter is the champion, we should assume that he leads in
6 E4 n7 r7 O5 C2 D8 }! w H$ c0 Ievery split? That would be a terrible way to teach the public how science
, c& D3 P$ t g& ?$ w9 m: }) {works.
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8 Z3 ^( u6 O9 W8 NFifth is the issue I oppose the most. Callaway quotes Ross Tucker and
8 l) _$ l7 X# Q) P* Iimplies that a drug test cannot rule out the possibility of doping. Is this% L% ^, v$ K1 M# y
kind of agnosticism what Nature really wants to teach its readers? By that
" K; k) X' `3 C# a# o+ Q) p7 L5 x3 zstandard, I estimate that at least half of the peer-reviewed scientific5 z ^0 J1 e F; E" k# v! U+ i# g
papers in Nature should be retracted. How can one convince the editors and
" y! @4 K% p, e3 s! i, H0 L9 Ureviewers that their proposed theory works for every possible case? One
& A8 n z. m* ? S0 Dcannot. One chooses to apply the theory to typical examples and to2 a( d9 u/ ?1 f% N; `/ K, W' [% `) n
demonstrate that in (hopefully) all scenarios considered, the theory works' I( f( @& I a4 p
to a degree, and that that should warrant publication until a counterexample
1 H8 ?5 G1 @6 v q1 W+ S5 k$ mis found. I could imagine that Callaway has a sceptical mind, which is( B( r; U. n% v& s& P* B3 k
crucial to scientific thinking, but that would be put to better use if he; w/ E# g, h" }& l
wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly
4 o) b5 i6 e1 t3 Kadvanced, non-detectable drug that the Chinese have come up with in the2 J* Z( m$ @. B/ M$ J
past 4 years (they obviously did not have it in Beijing, otherwise why not
; N6 [9 Q8 t E$ f- Ruse it and woo the audience at home?), based on data and rational derivation9 S" F9 z5 t3 a. L
. This article, however, can be interpreted as saying that all athletes are' c* @, }- k. m6 u, Y, Y' |
doping and the authorities are just not good enough to catch them. That may" y# n$ s% w/ J C; }/ ~
be true, logically, but definitely will not make the case if there is ever a
4 X0 S0 r B* _1 G7 w" Zhearing by the governing body for water sports, FINA, to determine if Ye
3 b$ v$ ~; R3 N8 p9 j8 N5 bhas doped. To ask whether it is possible to obtain a false negative in a9 c( X+ r4 a6 \0 T- c. d5 `+ O2 U
drug test looks like a rigged question to me. Of course it is possible:# I) j" v; p ]- \- m
other than the athlete taking a drug that the test is not designed to detect" ~3 t1 t5 c# |
, anyone who has taken quantum 101 will tell you that everything is1 x \, f: t% E9 O& G9 l. p$ h% E# N0 b
probabilistic in nature, and so there is a probability that the drug in an
3 m* I# ^; q' @; n5 Iathlete’s system could tunnel out right at the moment of the test. A slight
! o" S. J, X* x7 p: qchance it may be, but should we disregard all test results because of it?8 R. j2 v( k2 Z
Let’s be practical and reasonable, and accept that the World Anti-Doping' W! l& z/ k( Y- A3 N
agency (WADA) is competent at its job. Ye’s urine sample will be stored for, N5 [1 S$ N( i
eight years after the contest for future testing as technology advances.
8 d$ `( ^6 L4 ?, T( O6 \- b O5 N% xInnocent until proven guilty, shouldn’t it be?1 D9 r1 b4 q* J. C2 o2 T
0 f7 n3 H3 U4 `2 n) B/ `, CSixth, and the last point I would like to make, is that the out-of-
/ f+ Y- l$ L z. O2 p0 Y) rcompetition drug test is already in effect, which Callaway failed to mention9 q; P) `( g% {: ?
. As noted in the president of WADA’s press release, drug testing for
" S3 P: g3 i) l' ^: ]Olympians began at least six months before the opening of the London
4 t8 O- l5 N- B! I7 D+ wOlympics. Furthermore, 107 athletes have been banned from this Olympics for$ O, V0 n* B$ d& C
doping. That may be the reason that “everyone will pass at the Olympic
/ y& M0 ~% t% M" Rgames. Hardly anyone fails in competition testing” — those who did dope% l1 o; ^8 ]. e4 f# {
have already been caught and sanctioned. Callaway is free to suggest that a9 C5 M4 }! {! R$ J1 N
player could have doped beforehand and fooled the test at the game, but this9 z4 Y) b9 E( p* Z0 n
possibility is certainly ruled out for Ye.8 N0 ? K3 ~' [. z
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Over all, even though Callaway did not falsify any data, he did (
$ `* D% u) a7 S9 J; X0 jintentionally or not) cherry-pick data that, in my view, are far too
' ?5 N: }+ Q$ G7 t# r/ N# Asuggestive to be fair and unbiased. If you want to cover a story of a
6 L) C" Y0 D' F0 U% ~7 gsuspected doping from a scientific point of view, be impartial and provide
! W9 u7 o* y! u* C) K) \) J+ Eall the facts for the reader to judge. You are entitled to your" P# X4 R# c7 k/ a! J r, R
interpretation of the facts, and the expression thereof in your piece,
) t/ X& s( i$ ?$ l- K+ [( i" Kexplicitly or otherwise, but showing only evidence that favours your* E3 u) s: X- @+ T
argument is hardly good science or journalism. Such an article in a journal
- [! N: \7 m$ ^6 H \* [3 Bsuch as Nature is not an appropriate example of how scientific research or
; L# @$ \" i3 T" b, \reporting should be done. |
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