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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
4 l% o6 j8 n$ P1 \; l5 q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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3 O8 {2 R$ s* G7 [ N, E6 L. y6 L) c; P$ Yhttp://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html: q# C% F/ a' H$ E* ^
+ z& R* c8 q6 fFROM LAI JIANG, Department of Chemistry, University of Pennsylvania% C9 K/ ] }4 }% U3 ?
$ w1 U0 X7 m' X% H' |1 UIt is a shame to see Nature — which nearly all scientists, including myself. k, L2 E/ O2 g% @* z3 s0 L. \& e
, regard as one of the most prestigious and influential physical-science
3 g0 g V' q. L# L |% C4 Dmagazines — publish a thinly veiled biased article like this. Granted, this
3 C2 x/ ~! M1 Bis not a peer-reviewed scientific article and did not go through the
' p$ M3 `1 l, O1 Qscrutiny of picking referees. But to serve as a channel for the general
5 R% W2 z8 |4 A) _( ypopulace to be in touch with and appreciate science, the authors and editors" Q4 ]/ R2 \% ]# g+ W0 T' [6 l
should at least present the readers with facts within the proper context,: z n* {7 U r$ _, Y% c
which they blatantly failed to do.2 W6 v9 V! j! d0 \
0 d+ E K! e+ x" V5 _First, to identify Ye’s performance increase, Ewen Callaway compared her
( C! t* |( g( l- Q- YOlympic 400-metre IM time with her performance at the World Championships in& F1 o& t/ F6 a% \7 T3 k, r; ~( T- ]
2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “
% q1 G6 C1 S6 R8 h! r- S9 R# Q; Aanomalous” improvement of around 7 seconds (6.72 s). In fact, her previous
6 M) e7 r% o" ] s" G( y+ dpersonal best was 4:33.79 at the Asian Games in 2010. This leads to an
7 c: Z9 B2 B0 K/ `8 Fimprovement of 5.38 seconds. In a sporting event in which 0.1 s can be the5 _, U1 A, \% {8 e
difference between the gold and silver medal, I see no reason for 5.38 s to7 ~8 o, Y3 e6 q9 V5 Q2 M
be treated as 7 s.1 J) ]; K( q/ E$ C7 K
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Second, as previously pointed out, Ye is only 16 years old and her body is8 O' m7 t3 @3 n( s C* M# N
still developing. Bettering oneself by 5 seconds over two years may seem
! E: w, s7 d& P7 `impossible for an adult swimmer, but it certainly happens among youngsters.
$ u+ b* s: t% T9 Q& g6 GAn interview with Australian gold medallist Ian Thorpe revealed that his 400/ P7 e) {$ w. m3 R
-metre freestyle time improved by 5 seconds between the ages of 15 and 16.
7 A3 d/ E3 y% s8 L( hFor regular people, including Callaway, it may be hard to imagine what an
+ ~% R: l, C+ A: b; delite swimmer can achieve as he or she matures and undergoes scientific and- v& u; F* P* e" `+ N$ w7 r8 F1 F/ m
persistent training. But jumping to the conclusion that it is “anomalous”
3 ~5 J6 O" o& A( ybased on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.
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3 R+ {+ q% B! v7 X- x6 IThird, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook5 l9 S! [7 g) W6 s8 }2 ~: v
example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in
- y, S; {( x! p5 Dthe last 50 metres, but Lochte had a huge lead in the first 300 metres, so
9 b! N+ G& L' F) f& A2 U @8 ~( ^he chose not to push himself too hard and to conserve his energy for later
2 a5 g% Y) {, @' j- c/ fevents (whether this conforms to the Olympic spirit and the ‘use one’s0 ~3 n4 B9 ^7 D2 F& m' i! s
best efforts to win a match’ requirement that the Badminton World
+ E5 i2 u5 u9 mFederation recently invoked to disqualify four badminton pairs is another/ v' v1 Y2 E9 M$ F/ ^
topic worth discussing, though probably not in Nature). Ye, on the other/ g' \* O$ G, n+ C
hand, was trailing behind after the first 300 metres and relied on freestyle$ M% W( _5 P6 B& g
, in which she has an edge, to win the race. Failing to mention this
+ p- C0 [" Q5 B& ostrategic difference, as well as the fact that Lochte is 23.25 seconds
! [( {5 ?6 y& P lfaster (4:05.18) than Ye overall, creates the illusion that a woman swam
8 y, W v, f0 h6 }7 i$ dfaster than the best man in the same sport, which sounds impossible. Putting
8 [0 _7 F2 B9 X1 p9 v" Z: Jaside the gender argument, I believe this is still a leading question that
% s/ R% Q# O' a: S# aimplies 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
1 K% Q- [! R' ~0 zfour male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.939 C6 a+ K* A( E3 @5 C3 j" O
s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s
8 R) a3 x9 x. E, Y), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns
k* j1 [) D2 [' @% [" J1 `out, if we are just talking about the last 50 metres in a 400-metre IM,
' D) e/ ^/ U. }4 FLochter is not the example I would have used if I were the author. What kind% n% I( O" F* ~5 k6 h
of scientific rigorousness is Callaway trying to demonstrate here? Is it
$ D- @* x% c) S9 w# t; ?1 flogical that if Lochter is the champion, we should assume that he leads in
# D% V8 M, l# a9 J2 U& Y' J+ Xevery split? That would be a terrible way to teach the public how science. Q) i2 Y. @ \# q
works.8 S# O9 d5 ^1 {% R7 Z
' a5 j) `/ G1 K QFifth is the issue I oppose the most. Callaway quotes Ross Tucker and
% M& p: k% Y7 @4 w) Q/ P% a2 mimplies that a drug test cannot rule out the possibility of doping. Is this: U2 G5 X9 m5 P: E" B
kind of agnosticism what Nature really wants to teach its readers? By that
: C# t# w/ w9 d1 b8 b5 lstandard, I estimate that at least half of the peer-reviewed scientific" U6 L9 L" C% g, F& ]1 G6 A
papers in Nature should be retracted. How can one convince the editors and. q4 k! `. f4 l( e% m* h
reviewers that their proposed theory works for every possible case? One
5 X' J+ x& @0 `8 s d5 P% B. ncannot. One chooses to apply the theory to typical examples and to3 S& F+ g0 H) Z' z
demonstrate that in (hopefully) all scenarios considered, the theory works% t! u# T" v% g9 ~% J
to a degree, and that that should warrant publication until a counterexample1 |; K9 ~# R5 y" B3 C
is found. I could imagine that Callaway has a sceptical mind, which is
. U5 R0 ]; @" B5 Hcrucial to scientific thinking, but that would be put to better use if he
w* _- q. c/ ?! Bwrote a peer-reviewed paper that discussed the odds of Ye doping on a highly
* N3 t! w6 C: g9 l9 Q1 v$ radvanced, non-detectable drug that the Chinese have come up with in the
# t; @; ~% `" Rpast 4 years (they obviously did not have it in Beijing, otherwise why not; w a; x& H2 @. h1 `- x+ d
use it and woo the audience at home?), based on data and rational derivation
3 v, k x6 p2 d" \( R. d. This article, however, can be interpreted as saying that all athletes are
' F8 R* i' C/ o$ F, {+ j- Idoping and the authorities are just not good enough to catch them. That may
% R) E& K0 e5 l( E' c% h kbe true, logically, but definitely will not make the case if there is ever a; |5 R& N: E: @+ n+ Y5 A
hearing by the governing body for water sports, FINA, to determine if Ye0 F0 ?+ b) M, s% A: E
has doped. To ask whether it is possible to obtain a false negative in a
( b# D3 q- F) {, y9 N. Y: {drug test looks like a rigged question to me. Of course it is possible:
9 Q" A" g3 `1 T- i! Y! H6 ?other than the athlete taking a drug that the test is not designed to detect
3 G6 Y& c' K- `: m4 {& s$ j% n, anyone who has taken quantum 101 will tell you that everything is
# D/ ~4 J( n- M2 e* k- Lprobabilistic in nature, and so there is a probability that the drug in an
- T. D Y ?# J! Y i$ P' f7 \* bathlete’s system could tunnel out right at the moment of the test. A slight+ A( q% Y. k1 A- O8 c* o- D+ [) Q$ R
chance it may be, but should we disregard all test results because of it?" y. \" r% z8 |4 w# G9 c
Let’s be practical and reasonable, and accept that the World Anti-Doping
0 p4 H- g. Y0 lagency (WADA) is competent at its job. Ye’s urine sample will be stored for
, D( o' L6 O1 ~4 T8 neight years after the contest for future testing as technology advances.4 k) T1 H5 w' J0 f, T* {0 P. Z
Innocent until proven guilty, shouldn’t it be?8 v& L: f5 t- E; U$ D8 m
' T6 E) d4 y+ n5 KSixth, and the last point I would like to make, is that the out-of-4 T. i8 L0 E8 M5 V; b3 t% i
competition drug test is already in effect, which Callaway failed to mention
9 J3 ]6 F$ G0 f. As noted in the president of WADA’s press release, drug testing for
* _' Q# ]0 u o" L0 U- dOlympians began at least six months before the opening of the London; x9 [( M: [4 f. i3 E b
Olympics. Furthermore, 107 athletes have been banned from this Olympics for. N$ a3 s) n# O) [
doping. That may be the reason that “everyone will pass at the Olympic0 c# E4 k4 u. @8 s
games. Hardly anyone fails in competition testing” — those who did dope- u" q5 W2 }. V" o% k; g
have already been caught and sanctioned. Callaway is free to suggest that a1 ?/ ]2 h9 J$ O& N! _2 O" E- N
player could have doped beforehand and fooled the test at the game, but this
: l; H; k+ m, a: bpossibility is certainly ruled out for Ye.
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Over all, even though Callaway did not falsify any data, he did (! B8 N% }( i+ `2 p* A
intentionally or not) cherry-pick data that, in my view, are far too0 }1 u9 l$ q' g) p3 ^
suggestive to be fair and unbiased. If you want to cover a story of a' u- Q6 c$ _& p3 v
suspected doping from a scientific point of view, be impartial and provide3 X/ E, h& @) x9 g
all the facts for the reader to judge. You are entitled to your6 G7 E( w$ j# Q
interpretation of the facts, and the expression thereof in your piece,' `& Z1 r, X& G: C
explicitly or otherwise, but showing only evidence that favours your
9 J, i8 }* i+ z; n! m9 h+ nargument is hardly good science or journalism. Such an article in a journal9 c7 i. `+ @8 g1 p
such as Nature is not an appropriate example of how scientific research or
- _% ^7 J$ w+ H9 }/ rreporting should be done. |
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