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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. N$ z# K$ K) f9 G4 Z& Z/ Z
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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http://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html
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FROM LAI JIANG, Department of Chemistry, University of Pennsylvania
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* W# E% d; q+ S, e9 Q8 hIt is a shame to see Nature — which nearly all scientists, including myself) c* N1 T0 w) z9 q, a5 i' e1 M" G
, regard as one of the most prestigious and influential physical-science3 N3 Z* Y, _* R$ s: L
magazines — publish a thinly veiled biased article like this. Granted, this
6 Q% z, V9 Z9 _2 ~( c% _. Fis not a peer-reviewed scientific article and did not go through the
# i% q6 D& r8 Zscrutiny of picking referees. But to serve as a channel for the general' Y. e% {; F2 {: ~& f4 y' V1 d
populace to be in touch with and appreciate science, the authors and editors
2 c/ C& S+ |3 Kshould at least present the readers with facts within the proper context,
9 H6 o2 N! h; N& m& o J7 Lwhich they blatantly failed to do.
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! L( m% N$ s `( _$ Z& G0 z8 }. Q$ oFirst, to identify Ye’s performance increase, Ewen Callaway compared her" e. [2 x$ ]7 ]9 l2 A
Olympic 400-metre IM time with her performance at the World Championships in$ o4 l) b, b. g( k( `: s+ |- m# X
2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “ T' s8 i' C2 U# \6 K/ H
anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous% ?3 n5 u) i/ X6 n. x
personal best was 4:33.79 at the Asian Games in 2010. This leads to an
+ Q- n, b( H6 g) limprovement of 5.38 seconds. In a sporting event in which 0.1 s can be the
- O+ C! h* j9 n7 W" a+ Mdifference between the gold and silver medal, I see no reason for 5.38 s to
8 O o0 g) `, s+ U4 `) Abe treated as 7 s.2 P4 Y) T- X9 w4 @2 @8 {" f. U$ a2 N
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Second, as previously pointed out, Ye is only 16 years old and her body is
$ m1 ]( n6 w, t8 Tstill developing. Bettering oneself by 5 seconds over two years may seem
6 a0 y) ~; W. c+ W( F1 Bimpossible for an adult swimmer, but it certainly happens among youngsters.( `( _4 ~$ Y: a7 M
An interview with Australian gold medallist Ian Thorpe revealed that his 400
5 f! M, Y" [/ b, f9 Z5 Q8 F5 }/ d-metre freestyle time improved by 5 seconds between the ages of 15 and 16.! M$ \; b; d) V5 K( m C
For regular people, including Callaway, it may be hard to imagine what an
% B2 }# L5 m! y3 \! \$ K. Telite swimmer can achieve as he or she matures and undergoes scientific and7 q; }# s5 f5 n: n' L7 x7 B
persistent training. But jumping to the conclusion that it is “anomalous”- S0 f& a- |8 Q, _3 A
based on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.% X, T. H, k R b: ?, }$ O+ @
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Third, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook' W" V& [# q4 l" b7 P
example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in% m. d& T3 k/ U
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so
2 x' t S9 ~7 C+ M# vhe chose not to push himself too hard and to conserve his energy for later
: p3 l! `( Y# F: d7 i" gevents (whether this conforms to the Olympic spirit and the ‘use one’s
% h0 z2 L4 Z, A8 Kbest efforts to win a match’ requirement that the Badminton World
0 T+ C7 M5 l; r S* J+ bFederation recently invoked to disqualify four badminton pairs is another, y1 S" {! C; @6 E+ ~3 D
topic worth discussing, though probably not in Nature). Ye, on the other
. O- r8 m- i# Y' T5 ]2 ?hand, was trailing behind after the first 300 metres and relied on freestyle
I- n$ V% d6 k% r, in which she has an edge, to win the race. Failing to mention this
! x: T6 O* a/ ^6 ^( X0 pstrategic difference, as well as the fact that Lochte is 23.25 seconds
& }) s; `) z; i+ N3 p- E4 r- ffaster (4:05.18) than Ye overall, creates the illusion that a woman swam4 S# l- }( Z1 {! u( `9 Q- J
faster than the best man in the same sport, which sounds impossible. Putting1 Z' H: _+ W7 \/ @2 C+ K
aside the gender argument, I believe this is still a leading question that
1 x7 E' C& Q: n# c3 _8 nimplies 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
* n+ i" Y3 T3 O+ @four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93
4 U1 `$ [5 K9 B* t. Ks) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s& A( l8 n# J* j& q2 h8 R) M: |
), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns6 U% J7 {) E: Q4 \% V1 S
out, if we are just talking about the last 50 metres in a 400-metre IM,8 s, s$ a# a" l V
Lochter is not the example I would have used if I were the author. What kind9 l) y; A% ], {% F
of scientific rigorousness is Callaway trying to demonstrate here? Is it: G) N t" k5 f1 B4 C
logical that if Lochter is the champion, we should assume that he leads in; |8 y( N+ L! O+ W" P4 l2 B
every split? That would be a terrible way to teach the public how science
+ }3 S- l4 p) g* }works.
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Fifth is the issue I oppose the most. Callaway quotes Ross Tucker and7 t1 i& E6 s* i" Q; W2 v
implies that a drug test cannot rule out the possibility of doping. Is this
1 |: c. {0 r9 `1 w4 G ikind of agnosticism what Nature really wants to teach its readers? By that' H. Z% M) ~/ W" n* T* `" k
standard, I estimate that at least half of the peer-reviewed scientific
/ ?' {* \/ z; L/ Z& g( Q7 d% Cpapers in Nature should be retracted. How can one convince the editors and
% l' K7 f' W S& p" G! k M! W* Creviewers that their proposed theory works for every possible case? One
6 E: k$ ]" u% t9 vcannot. One chooses to apply the theory to typical examples and to
, v j" w5 N/ V$ i) xdemonstrate that in (hopefully) all scenarios considered, the theory works0 P. K0 R5 R- O: ^
to a degree, and that that should warrant publication until a counterexample! ~5 A7 K: i& z: J5 R3 m2 V
is found. I could imagine that Callaway has a sceptical mind, which is* ~1 h- S3 Q+ ~- }, Y
crucial to scientific thinking, but that would be put to better use if he, E. e: p" c) J" m3 ^7 q
wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly) H% ~: [2 z- M% R
advanced, non-detectable drug that the Chinese have come up with in the$ K' U0 l2 c9 f: ]& v$ H, o
past 4 years (they obviously did not have it in Beijing, otherwise why not
$ {5 B& j; s! p# u& L% c2 Iuse it and woo the audience at home?), based on data and rational derivation' V9 w8 X5 P9 S! X( |$ b+ v* ?
. This article, however, can be interpreted as saying that all athletes are
" C9 P+ @7 p1 K% s- Zdoping and the authorities are just not good enough to catch them. That may3 a3 E- ^6 |( q7 {- K: B2 B
be true, logically, but definitely will not make the case if there is ever a
/ F! S+ {9 @+ M* phearing by the governing body for water sports, FINA, to determine if Ye
7 k3 r7 z3 M* t; G8 o# A) }1 `has doped. To ask whether it is possible to obtain a false negative in a
) ^% V J5 C% `. bdrug test looks like a rigged question to me. Of course it is possible:* b1 @: D" N" @. E2 l- Q
other than the athlete taking a drug that the test is not designed to detect
1 ~) n7 p8 e' c' k, anyone who has taken quantum 101 will tell you that everything is7 w+ Z4 b& N9 O: g2 F$ r
probabilistic in nature, and so there is a probability that the drug in an
2 F6 u" v0 B# M& G5 p5 d: ]athlete’s system could tunnel out right at the moment of the test. A slight( A! |& @+ s/ N) A. ` l
chance it may be, but should we disregard all test results because of it?% ?( j4 W- K1 v9 s. n
Let’s be practical and reasonable, and accept that the World Anti-Doping, D% F- |9 m. c6 B
agency (WADA) is competent at its job. Ye’s urine sample will be stored for. i+ U2 {( b1 [0 t2 e! G; {
eight years after the contest for future testing as technology advances.
9 Z1 H' G9 m1 c- eInnocent until proven guilty, shouldn’t it be?* l8 C, v9 d) L5 w7 u/ @5 `* i
8 T0 f8 n$ F- p1 a: ^Sixth, and the last point I would like to make, is that the out-of-- A# A$ H: f, W5 h3 Z
competition drug test is already in effect, which Callaway failed to mention* y6 |0 B# ]0 G7 g# M Z
. As noted in the president of WADA’s press release, drug testing for, y" X! K2 @9 D- x1 l" Z S
Olympians began at least six months before the opening of the London
: J( S$ e3 }% H& ^" ?: hOlympics. Furthermore, 107 athletes have been banned from this Olympics for
% L2 C4 J) ?8 W1 w8 Ndoping. That may be the reason that “everyone will pass at the Olympic
% i( m0 T& k( f# {games. Hardly anyone fails in competition testing” — those who did dope
8 _, Q- d$ U& c0 Uhave already been caught and sanctioned. Callaway is free to suggest that a
8 }9 C H& V4 h1 N$ vplayer could have doped beforehand and fooled the test at the game, but this
! f" o( k ~! V( \* s5 c& {possibility is certainly ruled out for Ye.5 O# Y) U- R7 x$ r. y) ^9 L8 H
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Over all, even though Callaway did not falsify any data, he did (
# B: D! U' `9 Q4 ], n& pintentionally or not) cherry-pick data that, in my view, are far too
4 p9 D$ _, N' [, O/ b- E& u8 isuggestive to be fair and unbiased. If you want to cover a story of a8 r5 r' j8 t2 P1 j: c8 R, S! a! V
suspected doping from a scientific point of view, be impartial and provide& }/ E# C" t4 @- ^) X/ h
all the facts for the reader to judge. You are entitled to your8 q% Z8 B; I8 {$ J
interpretation of the facts, and the expression thereof in your piece,* \+ Z2 g! \, z0 A
explicitly or otherwise, but showing only evidence that favours your* A. ~; ^1 d. C8 z6 q
argument is hardly good science or journalism. Such an article in a journal& S6 F( [5 l( K1 k* \- m: t6 d
such as Nature is not an appropriate example of how scientific research or
# F0 M/ P3 b; q) J1 I: H0 j7 @9 rreporting should be done. |
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