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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
" K4 q9 S, O" S, f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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7 S2 i7 O: g5 E* ~4 p& Q3 Rhttp://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html
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FROM LAI JIANG, Department of Chemistry, University of Pennsylvania2 C8 ?! H- N) c! C l) H
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It is a shame to see Nature — which nearly all scientists, including myself. }0 T1 j8 M! ?4 u* |3 N
, regard as one of the most prestigious and influential physical-science: h' G1 ]& v* v5 t5 l
magazines — publish a thinly veiled biased article like this. Granted, this
6 W" G6 R U5 N9 g0 O9 o- U/ m: m1 His not a peer-reviewed scientific article and did not go through the
6 R5 E# b0 E0 e, K3 F) t% Mscrutiny of picking referees. But to serve as a channel for the general
: c9 z7 ?: B! M2 e' Ipopulace to be in touch with and appreciate science, the authors and editors
2 _5 |% C( ?. Fshould at least present the readers with facts within the proper context,. _, S* Y+ v. D6 x- i1 j& _* A
which they blatantly failed to do.
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/ ]1 W4 ]% {1 L2 s/ ?First, to identify Ye’s performance increase, Ewen Callaway compared her0 n" k1 ?+ W# c8 Q( h. T0 Z: v
Olympic 400-metre IM time with her performance at the World Championships in4 `4 |/ t, Y0 d R: B( B4 `! a
2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “
+ R) ~% B: V' q8 R! @anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous: [ f- Z& w# Y/ }+ u
personal best was 4:33.79 at the Asian Games in 2010. This leads to an1 X8 A) D0 G* W; w& f
improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the5 I/ W+ T: K3 c
difference between the gold and silver medal, I see no reason for 5.38 s to
7 M+ Q, k# z4 i& _be treated as 7 s.
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Second, as previously pointed out, Ye is only 16 years old and her body is
9 g5 p1 M5 K( H% F. s2 qstill developing. Bettering oneself by 5 seconds over two years may seem
6 ?2 V$ w. |8 _) v2 k$ mimpossible for an adult swimmer, but it certainly happens among youngsters.
3 S2 S/ _. M% U N8 jAn interview with Australian gold medallist Ian Thorpe revealed that his 400% R" m& h. |6 t6 q8 R" ]
-metre freestyle time improved by 5 seconds between the ages of 15 and 16.! t8 p! t4 D& L# y4 P
For regular people, including Callaway, it may be hard to imagine what an
, g. ]1 K" X7 [, j# Selite swimmer can achieve as he or she matures and undergoes scientific and \& }% t& t0 l5 V6 j% g, k
persistent training. But jumping to the conclusion that it is “anomalous”
$ Y$ J/ _1 [& E/ t4 D& } S4 fbased on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.' l" F; s" M g# c& R, C
8 b/ s( r0 p- J u+ }1 M( J5 vThird, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook
& J4 c+ I# `. Y) C0 Z1 jexample of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in
6 I Q% q# g4 \the last 50 metres, but Lochte had a huge lead in the first 300 metres, so! y3 V1 j0 c6 |" V# U. G
he chose not to push himself too hard and to conserve his energy for later
$ c9 H; \, W% V# p: M1 _6 eevents (whether this conforms to the Olympic spirit and the ‘use one’s
+ b' o* Q6 \/ w4 p7 N# rbest efforts to win a match’ requirement that the Badminton World
- ?! B! s* s* i* S# a$ TFederation recently invoked to disqualify four badminton pairs is another$ E, N2 P- h0 C# z
topic worth discussing, though probably not in Nature). Ye, on the other
& A; `$ S5 C7 u: p* ]1 J4 Ihand, was trailing behind after the first 300 metres and relied on freestyle$ Y0 \% M. b# P) ^3 f: j
, in which she has an edge, to win the race. Failing to mention this
8 w" ?+ F* ?$ L" K- Gstrategic difference, as well as the fact that Lochte is 23.25 seconds
0 U: Q+ ^! V& _6 l; B2 i8 Efaster (4:05.18) than Ye overall, creates the illusion that a woman swam( @. F* U- c& I* K+ H
faster than the best man in the same sport, which sounds impossible. Putting8 C. Y2 F: D. i5 X, ^2 j" a( G
aside the gender argument, I believe this is still a leading question that
7 z! ]6 A# _; ]" `+ e) {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 are+ K1 y' O1 S) a Z, D
four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93
& L# I, F- L! r' B3 s, X: L. x* bs) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s
/ C$ V8 H( n' \/ g( S! \), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns
' } f# I" {' @) {out, if we are just talking about the last 50 metres in a 400-metre IM,
& h `& j" D4 u, o6 @Lochter is not the example I would have used if I were the author. What kind! w5 V1 Y4 @7 D4 l7 l) d o
of scientific rigorousness is Callaway trying to demonstrate here? Is it. b6 i1 m+ y9 _5 H6 k% R# R( l7 h$ S. g
logical that if Lochter is the champion, we should assume that he leads in% n$ d& n, Q4 L/ [6 N3 L* ^
every split? That would be a terrible way to teach the public how science+ T+ n9 a) F9 ?( i5 E
works.
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Fifth is the issue I oppose the most. Callaway quotes Ross Tucker and# W9 G* h/ W: \0 K/ b6 y, }1 v. Z
implies that a drug test cannot rule out the possibility of doping. Is this
% G$ S2 E% x- h8 V6 @, ~* ]kind of agnosticism what Nature really wants to teach its readers? By that
# o; L* L, y# `standard, I estimate that at least half of the peer-reviewed scientific, @' ]/ W* V; z
papers in Nature should be retracted. How can one convince the editors and# `) t( S1 m& L! V+ a
reviewers that their proposed theory works for every possible case? One
4 U' k" C- F# ?- Y) _, T% H$ |; vcannot. One chooses to apply the theory to typical examples and to
+ O h3 k6 G! Z/ jdemonstrate that in (hopefully) all scenarios considered, the theory works
- \9 Q! Z! ?! `to a degree, and that that should warrant publication until a counterexample8 T+ ~% A! T- y! \
is found. I could imagine that Callaway has a sceptical mind, which is5 \% q- g) I5 z. W5 K S& r
crucial to scientific thinking, but that would be put to better use if he; D9 E$ v. ~1 C3 P0 \+ [
wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly: [/ R1 Z# T, z4 [+ C1 s
advanced, non-detectable drug that the Chinese have come up with in the
8 n/ j2 J F1 H$ F/ ?* E/ Qpast 4 years (they obviously did not have it in Beijing, otherwise why not/ h7 F- }7 k5 l! t
use it and woo the audience at home?), based on data and rational derivation
# Y& j s7 C' o! L2 m9 q. This article, however, can be interpreted as saying that all athletes are
7 Y. n- {9 w$ i2 |$ wdoping and the authorities are just not good enough to catch them. That may; J0 i; h) G2 t7 d9 ^: B
be true, logically, but definitely will not make the case if there is ever a8 q! I; j6 s' Y5 @& B9 p
hearing by the governing body for water sports, FINA, to determine if Ye5 n7 W( k" n1 m1 f8 {
has doped. To ask whether it is possible to obtain a false negative in a5 T( t+ ?6 }3 z* _7 G
drug test looks like a rigged question to me. Of course it is possible:8 K+ J2 m, p5 p) z) c
other than the athlete taking a drug that the test is not designed to detect
* f2 I; K- J6 N3 }9 S, anyone who has taken quantum 101 will tell you that everything is' Y$ P, u5 C$ |
probabilistic in nature, and so there is a probability that the drug in an
Z& h- b6 _2 E: sathlete’s system could tunnel out right at the moment of the test. A slight
. ^$ D9 }& `8 W0 ]chance it may be, but should we disregard all test results because of it?1 O7 I2 q2 h6 a( z. Z8 C
Let’s be practical and reasonable, and accept that the World Anti-Doping
$ \9 `% ^2 ]5 T8 [: E0 ^) Y8 @agency (WADA) is competent at its job. Ye’s urine sample will be stored for
- K0 v' A3 w: c0 Oeight years after the contest for future testing as technology advances.
, A; s; f5 o8 X8 S# ?3 r7 d wInnocent 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-
, x7 @9 l6 i% s) w" [competition drug test is already in effect, which Callaway failed to mention
. D5 W3 f; o, v. As noted in the president of WADA’s press release, drug testing for
! ], v9 U# e2 Q1 n2 a0 UOlympians began at least six months before the opening of the London( o: E( g# U( ~6 A
Olympics. Furthermore, 107 athletes have been banned from this Olympics for
6 I( U$ F) d5 k! H1 X, U6 idoping. That may be the reason that “everyone will pass at the Olympic7 Y4 {# O& [/ }" n: Z' t4 ^
games. Hardly anyone fails in competition testing” — those who did dope/ K& G4 C$ T! b
have already been caught and sanctioned. Callaway is free to suggest that a. n& p$ y, ?$ d4 m ~! h z
player could have doped beforehand and fooled the test at the game, but this
( T& ~% O5 N {% ~* I- L/ apossibility is certainly ruled out for Ye.6 `2 D* A5 o0 o- g2 Y/ f l
' b* J9 L$ \! _+ e. v2 p- f0 eOver all, even though Callaway did not falsify any data, he did (5 @" J6 z4 C" ^2 u) C
intentionally or not) cherry-pick data that, in my view, are far too
: j! ]) @1 T% M9 V8 A. {; Wsuggestive to be fair and unbiased. If you want to cover a story of a
# @- H. v5 q: T+ J5 Dsuspected doping from a scientific point of view, be impartial and provide
6 l: r, t+ q- J3 o" xall the facts for the reader to judge. You are entitled to your
9 k' ~+ p# W! ~4 ointerpretation of the facts, and the expression thereof in your piece,
/ J6 U6 N9 V* J# vexplicitly or otherwise, but showing only evidence that favours your
* f& K6 J3 a$ @7 O$ V3 _# ?argument is hardly good science or journalism. Such an article in a journal2 c H' ~9 ~0 X: C, D
such as Nature is not an appropriate example of how scientific research or2 _: q0 [# P$ o# j
reporting should be done. |
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