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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
& I5 \: }; R+ ~! Y如果是中国长大的,英语能到这种程度真是很不简单。- v9 p1 T( X# _; y! m3 [- h
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http://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html3 U3 s# m9 x3 j8 R- p
; l: V1 A5 B% z9 RFROM LAI JIANG, Department of Chemistry, University of Pennsylvania
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9 b9 n# Q$ Q8 Q! e7 O7 EIt is a shame to see Nature — which nearly all scientists, including myself
" q0 I! I- X; u. Q1 s5 y( t1 l+ f, regard as one of the most prestigious and influential physical-science8 ~; L5 j* ?; y$ _
magazines — publish a thinly veiled biased article like this. Granted, this7 L3 q3 b1 |$ B5 I# W% F1 d7 X
is not a peer-reviewed scientific article and did not go through the
: J* ^. g; n6 N" yscrutiny of picking referees. But to serve as a channel for the general
7 R: F$ h7 v& y2 `4 h1 ?- h+ M0 s: E! fpopulace to be in touch with and appreciate science, the authors and editors' K. [* N" v: @8 N& j; w* x8 W: V& s
should at least present the readers with facts within the proper context,
7 T8 M5 {& _6 _& p Y/ Owhich they blatantly failed to do.* S/ M0 D) U6 ?2 `2 v+ d& K. }+ i
( H3 Y( F- J p0 dFirst, to identify Ye’s performance increase, Ewen Callaway compared her& W7 K: b9 h- l! P+ k; y6 m
Olympic 400-metre IM time with her performance at the World Championships in
) {# f- k2 b. x# g9 N% Y( U2 Q2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “( Q! b3 k! l" M- V$ W" n
anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous
- o% n: R! q1 M( L! w6 [personal best was 4:33.79 at the Asian Games in 2010. This leads to an; ^0 f1 J% x; ^. s6 f2 C
improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the3 r, m, {% ]6 t, L
difference between the gold and silver medal, I see no reason for 5.38 s to( m4 p6 _+ d' T4 H# l" c
be treated as 7 s.; c2 a6 ^: V; @8 k
* ~' h; A6 ~2 t' X! y; c& y6 U- zSecond, as previously pointed out, Ye is only 16 years old and her body is
& v& w2 m) _* x2 o* Y: _7 ystill developing. Bettering oneself by 5 seconds over two years may seem
! c5 y* n R' f3 t- {5 ^2 fimpossible for an adult swimmer, but it certainly happens among youngsters.$ [2 X+ [7 D2 ^) k2 K3 ~! c
An interview with Australian gold medallist Ian Thorpe revealed that his 400
3 N; U! L( f! c$ M' H5 j-metre freestyle time improved by 5 seconds between the ages of 15 and 16.; M1 A R9 U9 i* ]) U! q
For regular people, including Callaway, it may be hard to imagine what an: m; r" n$ |2 `
elite swimmer can achieve as he or she matures and undergoes scientific and
: e- I% v3 f1 m4 cpersistent training. But jumping to the conclusion that it is “anomalous”
2 R7 }4 l- m3 h3 h5 ]( [/ h1 Cbased on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.+ k Y$ c9 p* E, Y; h9 C
, K& D( i. x9 U4 f _- }Third, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook
1 k/ D2 A( G! x( hexample of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in- d( J# I' {# p3 x* j
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so
8 g6 e9 B; q+ `he chose not to push himself too hard and to conserve his energy for later( X7 ?" k. F) \# |
events (whether this conforms to the Olympic spirit and the ‘use one’s
" O; ^% \5 h+ `+ R- \) dbest efforts to win a match’ requirement that the Badminton World: T k8 r0 I) h( W+ u$ k
Federation recently invoked to disqualify four badminton pairs is another
/ A; k0 @% r2 ?( [1 \/ ?topic worth discussing, though probably not in Nature). Ye, on the other3 ?3 u6 |; B" Q. r( e$ K
hand, was trailing behind after the first 300 metres and relied on freestyle
4 ~1 s* O+ ^. b8 W2 j, in which she has an edge, to win the race. Failing to mention this5 ~" t) c# |. C" [! v8 u! ]$ ?
strategic difference, as well as the fact that Lochte is 23.25 seconds
: T7 D+ S. K8 l( f- ~7 Afaster (4:05.18) than Ye overall, creates the illusion that a woman swam- o/ _3 f7 t9 l! Y
faster than the best man in the same sport, which sounds impossible. Putting9 n! y1 Z( a' A$ |1 H5 Q+ O
aside the gender argument, I believe this is still a leading question that4 ^2 P8 ]3 \3 ]
implies to the reader that there is something fishy going on.
7 }; P, D, m+ D4 k- M
+ D' [/ W! m5 S' X: MFourth is another example of cherry-picking. In the same event, there are
8 [) p$ p; l0 q' {& c5 ^four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.938 X9 L3 @$ ?# R
s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s
7 u( x" Z! A/ d), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns. I. Y" u& |4 R4 v" E
out, if we are just talking about the last 50 metres in a 400-metre IM,' W0 y* \/ i, `6 P
Lochter is not the example I would have used if I were the author. What kind
( f& I; j2 J4 \# u$ C4 F; aof scientific rigorousness is Callaway trying to demonstrate here? Is it
0 u* i" k3 x' ~4 R% Dlogical that if Lochter is the champion, we should assume that he leads in1 g& M7 O" |- N( E4 Q5 g
every split? That would be a terrible way to teach the public how science7 \0 ?/ i2 n& U: q' K8 c- u
works.: T6 S. `" w; H5 K/ E! G3 S$ W
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Fifth is the issue I oppose the most. Callaway quotes Ross Tucker and
. g; {6 x/ K9 n, @& u, S- d( z9 U/ b, J6 [5 ^implies that a drug test cannot rule out the possibility of doping. Is this: B- H/ O2 g- ^! L/ v8 U8 T3 I+ S
kind of agnosticism what Nature really wants to teach its readers? By that% L9 V8 q4 ]2 z6 y9 K
standard, I estimate that at least half of the peer-reviewed scientific
! @$ |7 M4 S/ @2 t7 \papers in Nature should be retracted. How can one convince the editors and9 {, B5 `- t% c, R5 J. G" B
reviewers that their proposed theory works for every possible case? One- o8 J8 y( i* g! \; ]$ s
cannot. One chooses to apply the theory to typical examples and to2 ~+ F: @1 _( }* F0 I/ m- s! v
demonstrate that in (hopefully) all scenarios considered, the theory works
# F( v) x/ f% A# T; E. _to a degree, and that that should warrant publication until a counterexample: q3 v. Y3 K" O
is found. I could imagine that Callaway has a sceptical mind, which is
% C* J2 Q/ n' U5 R) Ycrucial to scientific thinking, but that would be put to better use if he" W( L* Z$ H$ I9 D
wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly' {* C5 |5 a c0 X1 \
advanced, non-detectable drug that the Chinese have come up with in the
: d7 V2 E, a$ |* j2 spast 4 years (they obviously did not have it in Beijing, otherwise why not
. P, K7 ^- j" H& m1 O _# duse it and woo the audience at home?), based on data and rational derivation
+ `# O+ e" Z+ }/ t# }. This article, however, can be interpreted as saying that all athletes are3 \: U& E1 }! r
doping and the authorities are just not good enough to catch them. That may
4 ]% D' E2 A8 ebe true, logically, but definitely will not make the case if there is ever a/ G8 ` k' {/ p- ~& A
hearing by the governing body for water sports, FINA, to determine if Ye6 }5 o. t* \) B
has doped. To ask whether it is possible to obtain a false negative in a) g# V3 ~$ {# O
drug test looks like a rigged question to me. Of course it is possible:
3 } Z( d$ w3 `% }9 T1 wother than the athlete taking a drug that the test is not designed to detect
. ]3 k" I3 \( @: `& w$ z/ G, anyone who has taken quantum 101 will tell you that everything is! m( r) B- r4 B( p( q# w: ?& |0 n
probabilistic in nature, and so there is a probability that the drug in an6 p1 |2 _ Q. ?5 P8 A7 y1 z ^2 H
athlete’s system could tunnel out right at the moment of the test. A slight# I# f" m$ w. u g
chance it may be, but should we disregard all test results because of it?8 B# Q+ S* y7 j/ J
Let’s be practical and reasonable, and accept that the World Anti-Doping0 _: P) E A4 A
agency (WADA) is competent at its job. Ye’s urine sample will be stored for* [- k" l+ r. X
eight years after the contest for future testing as technology advances.) M* i4 z8 s* L3 F4 x
Innocent until proven guilty, shouldn’t it be?# {3 h# U* r7 b2 a; |4 F! X
: l" S2 n; t8 C1 |2 u% jSixth, and the last point I would like to make, is that the out-of-
1 }: K" s( ^: Qcompetition drug test is already in effect, which Callaway failed to mention: `0 z* ^% o# s; Q1 C; k; z' q+ ~$ Y
. As noted in the president of WADA’s press release, drug testing for
5 N) Z: B k# [" DOlympians began at least six months before the opening of the London
, t4 v7 V% y: u1 O- ROlympics. Furthermore, 107 athletes have been banned from this Olympics for
, {9 j6 K4 R" m# |8 i7 t. pdoping. That may be the reason that “everyone will pass at the Olympic3 n0 S$ q2 |( `" l# v1 L
games. Hardly anyone fails in competition testing” — those who did dope% O5 |; ]! J1 ]9 R$ L8 l. m
have already been caught and sanctioned. Callaway is free to suggest that a
/ X6 ]; b( ~ O4 Eplayer could have doped beforehand and fooled the test at the game, but this
* X2 w* m) N" M Xpossibility is certainly ruled out for Ye.. @( ~+ N1 w1 F5 B7 t& v1 i
5 b, b( C2 G9 K$ N. DOver all, even though Callaway did not falsify any data, he did (" n/ y: F- m% V& E
intentionally or not) cherry-pick data that, in my view, are far too8 I7 O. P# h/ x: \+ w; A" v k
suggestive to be fair and unbiased. If you want to cover a story of a( V* }6 U( D$ N- k3 e. J
suspected doping from a scientific point of view, be impartial and provide
7 i) R6 J" X$ c: rall the facts for the reader to judge. You are entitled to your' p3 W! z7 ^( Z6 v# A. |
interpretation of the facts, and the expression thereof in your piece,
4 p7 |7 g% u8 z+ T n' fexplicitly or otherwise, but showing only evidence that favours your: h, o& f2 l6 i* `: z
argument is hardly good science or journalism. Such an article in a journal! `3 u/ }& ~: M; c4 w
such as Nature is not an appropriate example of how scientific research or
1 [2 h6 t3 e h& Vreporting should be done. |
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