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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. u1 p2 [& j6 t
如果是中国长大的,英语能到这种程度真是很不简单。- F" g/ V" U$ h% l, ^5 {
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http://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html7 x3 b: i+ ^3 m9 B7 {+ f
5 w) N0 m+ Z |9 _2 M% ZFROM LAI JIANG, Department of Chemistry, University of Pennsylvania4 _( O, q" K6 O2 V" L8 o4 N! N
1 z8 C! u: J, M: }# ^' FIt is a shame to see Nature — which nearly all scientists, including myself5 C. a! W% I' @ K
, regard as one of the most prestigious and influential physical-science! Z: Y7 r( B5 s
magazines — publish a thinly veiled biased article like this. Granted, this
0 }! j( K1 `$ |9 ^! _9 {! qis not a peer-reviewed scientific article and did not go through the; D& Q5 q- [0 A* O* ~5 B! R
scrutiny of picking referees. But to serve as a channel for the general
" \8 h+ ^" b4 Jpopulace to be in touch with and appreciate science, the authors and editors
# X: s& {' y5 o* Dshould at least present the readers with facts within the proper context,# v Y8 N# G+ x. K! z
which they blatantly failed to do.8 b, b# C% U( A
# `2 ^4 p/ B* {$ z: i+ w( ]& @, \) OFirst, to identify Ye’s performance increase, Ewen Callaway compared her
) U$ a) p* d9 I) n' Q* dOlympic 400-metre IM time with her performance at the World Championships in. i$ b6 I' r2 v" m/ L9 Y; |( [
2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “0 l6 X8 _8 G4 j* m
anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous
- @. I h% \& P, d8 y3 ~6 ^' N1 v/ ~* Opersonal best was 4:33.79 at the Asian Games in 2010. This leads to an
3 [3 @7 g4 N$ j* J" l* J$ O( r, ?improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the! |4 k; {2 r4 {. ^6 e: Q6 p
difference between the gold and silver medal, I see no reason for 5.38 s to' k- W: e% k% i2 a' C2 c! N
be treated as 7 s. q$ d+ L: J5 y0 w3 }& A* L; R* K
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Second, as previously pointed out, Ye is only 16 years old and her body is
+ `2 M* H3 g0 D% P, @still developing. Bettering oneself by 5 seconds over two years may seem
# o/ C4 n" M( `. L6 Vimpossible for an adult swimmer, but it certainly happens among youngsters.4 `9 n2 B. V e* k
An interview with Australian gold medallist Ian Thorpe revealed that his 400
0 g+ X' G- q% O! M# a: n, r-metre freestyle time improved by 5 seconds between the ages of 15 and 16.; a ^1 l/ ]2 Q# r0 X2 k7 D; U! C( V
For regular people, including Callaway, it may be hard to imagine what an
) s& y2 X2 ? y0 S# |elite swimmer can achieve as he or she matures and undergoes scientific and
/ ~% X ]8 D+ Lpersistent training. But jumping to the conclusion that it is “anomalous”
, I+ L/ ^% l% Y! S4 Xbased on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.
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) r D6 o' f- p% @% b) @2 [/ \0 eThird, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook
, L5 H9 X7 [1 t6 w+ [example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in0 _! d2 t' B. v5 ]/ y- g
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so% r8 x: R6 g J7 O1 \* b
he chose not to push himself too hard and to conserve his energy for later7 Y- E2 }/ m6 V6 p+ H( O6 ?
events (whether this conforms to the Olympic spirit and the ‘use one’s
& O+ f" z; G$ j8 @& g9 Hbest efforts to win a match’ requirement that the Badminton World
$ U0 K, H! j' V/ k }) HFederation recently invoked to disqualify four badminton pairs is another
7 x! C- ~0 M3 H/ K# ~" i. g6 Vtopic worth discussing, though probably not in Nature). Ye, on the other
$ q4 z; C2 e; @& ~7 M5 |5 Yhand, was trailing behind after the first 300 metres and relied on freestyle
! C5 G$ C0 o' @1 ?) d# a6 x, in which she has an edge, to win the race. Failing to mention this) y. z9 V4 C& q& \9 n
strategic difference, as well as the fact that Lochte is 23.25 seconds
* ?1 X" p* n' _faster (4:05.18) than Ye overall, creates the illusion that a woman swam2 o6 M, @' g* N: Z, F8 n
faster than the best man in the same sport, which sounds impossible. Putting
- V: Z' y- g0 y8 U& Saside the gender argument, I believe this is still a leading question that W. i1 G! K' W, B' q
implies to the reader that there is something fishy going on.# V8 n& @ f: L- T+ X
8 V# u6 f7 D5 E0 V0 TFourth is another example of cherry-picking. In the same event, there are
' u9 G6 ?- e% L5 V( @" d e% e, P' \four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93
7 q1 V7 T" o* d8 e% [s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s
7 @2 Q& r& x% `1 M* @1 H6 h), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns
0 p! [) L7 M2 l1 I' Z9 t) \& eout, if we are just talking about the last 50 metres in a 400-metre IM,( s5 W' I( v3 h4 Y. {3 ?
Lochter is not the example I would have used if I were the author. What kind: V; J- Y. ]7 z0 O; A% v9 L2 ^ _
of scientific rigorousness is Callaway trying to demonstrate here? Is it( h8 M6 W6 t1 v5 ?
logical that if Lochter is the champion, we should assume that he leads in
6 S3 g# |" P9 X3 x' }. x( h) I* Tevery split? That would be a terrible way to teach the public how science
! I4 L" o% ~% K' {works.6 Z6 b h8 b5 l
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Fifth is the issue I oppose the most. Callaway quotes Ross Tucker and' y* d+ ]- ~; `. [( a- {. w7 h
implies that a drug test cannot rule out the possibility of doping. Is this! G5 V, B6 A, B+ B7 Y6 f& Z
kind of agnosticism what Nature really wants to teach its readers? By that
9 L2 a" x6 U7 i" \& L; y5 O: pstandard, I estimate that at least half of the peer-reviewed scientific3 S* p+ x! V/ W9 B* ]
papers in Nature should be retracted. How can one convince the editors and
* p) c8 \0 F$ g! n- H6 jreviewers that their proposed theory works for every possible case? One
7 A; j0 T+ T" \& z& f" n5 `1 G# o4 Wcannot. One chooses to apply the theory to typical examples and to6 z4 O; z7 B* _# D! o. P* _; Y& F
demonstrate that in (hopefully) all scenarios considered, the theory works
% P2 `- R/ ^9 k+ F! @to a degree, and that that should warrant publication until a counterexample
+ p. {" J* E6 g5 y% Lis found. I could imagine that Callaway has a sceptical mind, which is
& {) q7 Q' F" R o. ]1 D0 x% G* F% Jcrucial to scientific thinking, but that would be put to better use if he7 G$ s: e6 t p/ W
wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly1 [: w; K7 ?/ Y0 ~5 r- t- G. w0 _
advanced, non-detectable drug that the Chinese have come up with in the
) w! P, t! x% j& C M/ H6 f6 `past 4 years (they obviously did not have it in Beijing, otherwise why not
) h# v: x+ |+ ~$ ]0 H3 e3 O, \; Yuse it and woo the audience at home?), based on data and rational derivation
3 s; E, c0 Q+ x T+ Q, h. This article, however, can be interpreted as saying that all athletes are, k( w9 W, M0 @- W) H/ ~. b7 `
doping and the authorities are just not good enough to catch them. That may
0 D9 q W3 ^2 q" F# U: {be true, logically, but definitely will not make the case if there is ever a( m9 P' }' ?; u% r: ?
hearing by the governing body for water sports, FINA, to determine if Ye
, K. R# `8 u! f% u7 Chas doped. To ask whether it is possible to obtain a false negative in a* I: ^+ |- B7 G! L8 Z
drug test looks like a rigged question to me. Of course it is possible:
+ G, x, b5 E; C& O0 ]other than the athlete taking a drug that the test is not designed to detect U7 j \0 ^; d7 T2 I1 c ?
, anyone who has taken quantum 101 will tell you that everything is( I& `$ d% U7 q3 v) r9 x# g
probabilistic in nature, and so there is a probability that the drug in an
( @& O2 S& H2 p; p: }athlete’s system could tunnel out right at the moment of the test. A slight& c0 |8 D4 B" i
chance it may be, but should we disregard all test results because of it?" j4 b6 u8 H# @* L \
Let’s be practical and reasonable, and accept that the World Anti-Doping; e# X$ w" V1 T1 N
agency (WADA) is competent at its job. Ye’s urine sample will be stored for
+ h! \2 C. q2 seight years after the contest for future testing as technology advances.
+ u( Y0 S9 r& }# z+ oInnocent until proven guilty, shouldn’t it be?5 r1 S; t' k; C! T9 ^3 C
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Sixth, and the last point I would like to make, is that the out-of-
; ~ b0 }: u. |, ^+ ecompetition drug test is already in effect, which Callaway failed to mention
* u1 _ \& w& X. As noted in the president of WADA’s press release, drug testing for
% ~, o. X. s- D' V1 q: A8 C! M; yOlympians began at least six months before the opening of the London
% h. _ |" |5 O7 e/ v& u* j8 b( ^Olympics. Furthermore, 107 athletes have been banned from this Olympics for5 i( S- |8 @7 t- d: a3 C3 O
doping. That may be the reason that “everyone will pass at the Olympic; _/ \% l2 J/ d# D# V* x
games. Hardly anyone fails in competition testing” — those who did dope
7 _9 V" c" a1 f' R% ]$ m- D! zhave already been caught and sanctioned. Callaway is free to suggest that a3 m, _7 s4 i, Q2 h, }3 O
player could have doped beforehand and fooled the test at the game, but this) V% Z! h5 ?# `# x4 a
possibility is certainly ruled out for Ye., ~: ?1 @. H1 Y, N" {
. P: R( J" A+ e4 M* n& D: HOver all, even though Callaway did not falsify any data, he did (
3 a$ ]! @/ F. D2 Z2 C. p- wintentionally or not) cherry-pick data that, in my view, are far too
, d/ ?! F# S1 ^$ E4 {6 {suggestive to be fair and unbiased. If you want to cover a story of a C, Q7 q5 C9 i7 N
suspected doping from a scientific point of view, be impartial and provide
# r' k7 {7 i A" |! a5 Kall the facts for the reader to judge. You are entitled to your
4 t0 s5 z! C& ainterpretation of the facts, and the expression thereof in your piece,
$ A* \" U3 B/ Vexplicitly or otherwise, but showing only evidence that favours your5 Y3 B. p0 ^, d2 B
argument is hardly good science or journalism. Such an article in a journal
+ C' \/ r/ g/ p( i* zsuch as Nature is not an appropriate example of how scientific research or3 ]/ s1 L' j8 r. u8 Q9 g. B
reporting should be done. |
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