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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
' D6 ?2 T4 G5 Y' i9 f如果是中国长大的,英语能到这种程度真是很不简单。6 M( _' r; R/ d F
5 D5 z0 M. A* M+ Bhttp://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html
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" v& T6 Y8 o1 k# wFROM LAI JIANG, Department of Chemistry, University of Pennsylvania
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It is a shame to see Nature — which nearly all scientists, including myself
# t. Y# }& j% B* t, regard as one of the most prestigious and influential physical-science
& N1 r$ G6 x4 M3 ~1 amagazines — publish a thinly veiled biased article like this. Granted, this: \: `9 U |4 C6 {5 D3 i9 E
is not a peer-reviewed scientific article and did not go through the, a) R {/ Q- E% [
scrutiny of picking referees. But to serve as a channel for the general1 h" f1 e. U9 q; j
populace to be in touch with and appreciate science, the authors and editors
* g8 j, q( B; y3 n: Eshould at least present the readers with facts within the proper context,
7 f1 J! j4 M+ ^& i0 x2 W2 vwhich they blatantly failed to do.
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First, to identify Ye’s performance increase, Ewen Callaway compared her
6 R6 W; v/ W+ x" DOlympic 400-metre IM time with her performance at the World Championships in0 c1 k! o+ B4 P+ v _
2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “
" ~' k4 O, I# t ] `: {( c; Banomalous” improvement of around 7 seconds (6.72 s). In fact, her previous' b( q: A. K. q0 e$ i" T
personal best was 4:33.79 at the Asian Games in 2010. This leads to an& F0 A& D8 {' r: _
improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the" {4 C6 ~- z/ T4 M% N4 m
difference between the gold and silver medal, I see no reason for 5.38 s to
: {( _ T) A0 Tbe treated as 7 s.
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( o; T* f/ I" n& l7 o* hSecond, as previously pointed out, Ye is only 16 years old and her body is
+ m; Z1 i* w0 |still developing. Bettering oneself by 5 seconds over two years may seem
9 C1 w9 w5 ^* q7 I# A2 Rimpossible for an adult swimmer, but it certainly happens among youngsters.
* c% z, P" J' A% B: BAn interview with Australian gold medallist Ian Thorpe revealed that his 400, L; l+ \+ S, S7 ?8 l7 n1 L
-metre freestyle time improved by 5 seconds between the ages of 15 and 16.1 E/ I1 ?* m7 B! }3 l
For regular people, including Callaway, it may be hard to imagine what an; ]9 o G$ {9 T
elite swimmer can achieve as he or she matures and undergoes scientific and( j* `# S6 \# [* ~- A
persistent training. But jumping to the conclusion that it is “anomalous”
+ X$ D: P: Z7 \1 b+ |% Q" lbased on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.
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Third, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook; r e& A" S6 C/ C" K$ ]
example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in! O p- @; q! ]9 k0 r8 S, e- Z# T
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so
% d) {% {& c9 P* H$ w: Q& _& yhe chose not to push himself too hard and to conserve his energy for later& `% j$ ~- v6 R- _+ A
events (whether this conforms to the Olympic spirit and the ‘use one’s
7 p! t5 Y" C. b+ s% M* z# _best efforts to win a match’ requirement that the Badminton World1 t9 d$ D1 K; F* t
Federation recently invoked to disqualify four badminton pairs is another
6 u9 P# [1 a/ m+ ?topic worth discussing, though probably not in Nature). Ye, on the other" p5 X2 n( e( O
hand, was trailing behind after the first 300 metres and relied on freestyle! m6 j1 ]) @/ s0 P( }7 ?
, in which she has an edge, to win the race. Failing to mention this( C' D1 x" P$ g- \) K1 w& X
strategic difference, as well as the fact that Lochte is 23.25 seconds7 z: B4 V" p/ t* K8 p
faster (4:05.18) than Ye overall, creates the illusion that a woman swam4 V M0 Z$ a q# f
faster than the best man in the same sport, which sounds impossible. Putting
9 {6 ]7 O$ m; h* u' _. `aside the gender argument, I believe this is still a leading question that0 u" T; U2 P3 h( E
implies to the reader that there is something fishy going on.
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6 _2 s! D) a5 hFourth is another example of cherry-picking. In the same event, there are
4 A9 \. R) a& D! v g) j' Hfour male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93
) y. V# B% H0 k% K& O6 Cs) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s8 O# F. q* a+ H" U0 k
), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns
) W2 O+ G* Q1 F) L+ C2 Rout, if we are just talking about the last 50 metres in a 400-metre IM,! Z. Y, W, \# M7 F# s
Lochter is not the example I would have used if I were the author. What kind
! M, `$ ^/ C0 @of scientific rigorousness is Callaway trying to demonstrate here? Is it
" d- Q; d* [) o+ H: {, Y* elogical that if Lochter is the champion, we should assume that he leads in
+ g1 d+ c* R0 tevery split? That would be a terrible way to teach the public how science
0 y {2 o- W2 y1 _: p* W5 q! Y0 Gworks.' S; Q. }, P' ~: j, {' a( R2 e E
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Fifth is the issue I oppose the most. Callaway quotes Ross Tucker and6 R& }+ U, Y# \) l9 ^
implies that a drug test cannot rule out the possibility of doping. Is this
# Y0 z) f- i5 R. skind of agnosticism what Nature really wants to teach its readers? By that- \4 u+ B) _: p2 \. X
standard, I estimate that at least half of the peer-reviewed scientific
4 H1 a1 j4 ]! \1 P+ j- C- Tpapers in Nature should be retracted. How can one convince the editors and
% d4 d S0 f' e, |9 x' {reviewers that their proposed theory works for every possible case? One( U3 @0 k8 n! `1 ~) G) c
cannot. One chooses to apply the theory to typical examples and to8 K+ A& j, L& K3 P/ b; v
demonstrate that in (hopefully) all scenarios considered, the theory works7 l8 G( {0 O* _
to a degree, and that that should warrant publication until a counterexample
8 J- h5 I6 i+ O7 a" ], Ois found. I could imagine that Callaway has a sceptical mind, which is
: r6 a" T- _* E) F0 f/ S! \2 f! jcrucial to scientific thinking, but that would be put to better use if he
: I3 \3 n+ D* E' e8 E( kwrote a peer-reviewed paper that discussed the odds of Ye doping on a highly
7 \" c6 \0 a2 k/ Q2 b* uadvanced, non-detectable drug that the Chinese have come up with in the) [. o, t; } ]& G0 s( M/ l
past 4 years (they obviously did not have it in Beijing, otherwise why not: N l/ k& a. E$ o A( k$ A e
use it and woo the audience at home?), based on data and rational derivation2 a7 p2 E% J4 Z: ~" H
. This article, however, can be interpreted as saying that all athletes are6 ~- F; T( C0 f4 _4 l
doping and the authorities are just not good enough to catch them. That may
; { F& h" g: |' j: gbe true, logically, but definitely will not make the case if there is ever a$ v! t2 F" T" r: w% {
hearing by the governing body for water sports, FINA, to determine if Ye
1 x& P! t. I6 G; \& zhas doped. To ask whether it is possible to obtain a false negative in a- { p7 f& l6 Q* N
drug test looks like a rigged question to me. Of course it is possible:/ `1 z: J6 b) z$ J4 N3 C+ r) _
other than the athlete taking a drug that the test is not designed to detect7 X& I- Q1 {+ q4 V o# T0 r
, anyone who has taken quantum 101 will tell you that everything is' M, m% V. x- Y# Z6 \8 M
probabilistic in nature, and so there is a probability that the drug in an6 w( J8 [; I# Q1 H2 P, |
athlete’s system could tunnel out right at the moment of the test. A slight7 B. R& v- p2 {& M& v' U' [
chance it may be, but should we disregard all test results because of it?. [: [! D. o& B
Let’s be practical and reasonable, and accept that the World Anti-Doping, L" j* J, R% F/ c- ~) j
agency (WADA) is competent at its job. Ye’s urine sample will be stored for
; X2 ]! l" u7 W+ qeight years after the contest for future testing as technology advances.5 V8 ^3 Z8 C9 g. |
Innocent until proven guilty, shouldn’t it be?/ Q9 k/ e; |) [( i% J" Q [
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Sixth, and the last point I would like to make, is that the out-of- q, c: G( s) X( r
competition drug test is already in effect, which Callaway failed to mention, T/ W! M! M" J/ ]
. As noted in the president of WADA’s press release, drug testing for
9 Y; }* T: Z) }* u$ z6 b; T1 I# qOlympians began at least six months before the opening of the London
9 F+ |0 `1 c7 I1 Y# ~! l) U4 ?Olympics. Furthermore, 107 athletes have been banned from this Olympics for
( ~/ ]. `" J9 y9 H4 [! Edoping. That may be the reason that “everyone will pass at the Olympic3 E) m7 N7 `% x
games. Hardly anyone fails in competition testing” — those who did dope$ d/ k+ m4 f* \4 v
have already been caught and sanctioned. Callaway is free to suggest that a% t+ ]' v6 t% P) O p
player could have doped beforehand and fooled the test at the game, but this/ h5 Y6 A% {9 m& [) W0 F
possibility is certainly ruled out for Ye.
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; f. {2 y! i/ L7 N" TOver all, even though Callaway did not falsify any data, he did (
2 S1 I$ k; J( [4 [+ ?* Q: aintentionally or not) cherry-pick data that, in my view, are far too% o# S/ J2 D* M9 t6 D. O5 |
suggestive to be fair and unbiased. If you want to cover a story of a
' t: G1 K7 X8 y. y W+ C& Xsuspected doping from a scientific point of view, be impartial and provide& F- m" R6 E" R( v8 \
all the facts for the reader to judge. You are entitled to your
% L. n. ]0 g* u* E5 C% F- Iinterpretation of the facts, and the expression thereof in your piece,7 V5 Z3 W$ m* g) N# q! k1 s. p" u
explicitly or otherwise, but showing only evidence that favours your
+ |) p! X* f' B5 g* v' Zargument is hardly good science or journalism. Such an article in a journal6 E' p( M+ R8 b7 k9 y
such as Nature is not an appropriate example of how scientific research or
" C* W) |& E$ |6 l" m1 h4 d" }' preporting should be done. |
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