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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' b& Y" @, ?5 ]' H; C+ \# n+ g- Q& L
如果是中国长大的,英语能到这种程度真是很不简单。- @# g2 h, ~3 t) _1 S9 b- r/ \
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http://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html
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FROM LAI JIANG, Department of Chemistry, University of Pennsylvania
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' x }- G# x. y( m4 g5 ^0 C% k' j: HIt is a shame to see Nature — which nearly all scientists, including myself; y4 _& x% F3 k( G/ S
, regard as one of the most prestigious and influential physical-science
1 _: ?. @0 m: amagazines — publish a thinly veiled biased article like this. Granted, this
% e1 y; g7 R$ y8 ~1 Ris not a peer-reviewed scientific article and did not go through the
2 ~( P) {7 \5 [, J7 X sscrutiny of picking referees. But to serve as a channel for the general
4 a+ N! U) n2 e$ p2 K0 Upopulace to be in touch with and appreciate science, the authors and editors+ G% k: H& m2 R3 Z
should at least present the readers with facts within the proper context,
" i d! G+ C ~5 ]; K: F4 Q5 l3 dwhich they blatantly failed to do.9 t' c- a; g( t6 M
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First, to identify Ye’s performance increase, Ewen Callaway compared her
% D* @6 W7 p b, B5 KOlympic 400-metre IM time with her performance at the World Championships in
- [9 M6 T8 t. E2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “
' {* U( Z' D* R. banomalous” improvement of around 7 seconds (6.72 s). In fact, her previous
- y7 p* l5 |$ A$ y- s5 Cpersonal best was 4:33.79 at the Asian Games in 2010. This leads to an1 M4 e+ X- b' C. R" A( K% w; q- X
improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the3 C7 z- c ~6 ^" B$ @$ g
difference between the gold and silver medal, I see no reason for 5.38 s to
4 {$ I/ R1 G0 U3 P5 {) u4 `7 g4 mbe treated as 7 s.5 M& A# J' z& M
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Second, as previously pointed out, Ye is only 16 years old and her body is
( a- L- s% J8 u) @! {8 l( H8 \3 ]still developing. Bettering oneself by 5 seconds over two years may seem' t5 @: Q3 ~, y2 v0 d4 p- U
impossible for an adult swimmer, but it certainly happens among youngsters.
5 S% b$ h* e/ L2 ]9 [8 JAn interview with Australian gold medallist Ian Thorpe revealed that his 400
/ n" _' M& Z3 a8 W-metre freestyle time improved by 5 seconds between the ages of 15 and 16.3 Y5 ~" ]' E9 I5 G
For regular people, including Callaway, it may be hard to imagine what an
- y0 a. g- W; g. Melite swimmer can achieve as he or she matures and undergoes scientific and s! x& X5 P6 [+ g4 {* Y7 e
persistent training. But jumping to the conclusion that it is “anomalous”& h1 |$ D0 r( n: k
based on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.) {) Q/ p* r3 z3 c& E- b4 [
A& Y5 g$ E8 e/ t9 T2 iThird, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook6 F% E) P$ O B4 n2 l' {. X
example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in) X s. m9 L6 S
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so
4 V/ H' Z* p5 B8 H! f" n7 H3 a4 ]* ohe chose not to push himself too hard and to conserve his energy for later
* v0 z1 n0 }; tevents (whether this conforms to the Olympic spirit and the ‘use one’s" e) K. s3 I! z$ \, h; B
best efforts to win a match’ requirement that the Badminton World
( i* b, _+ Y* \7 FFederation recently invoked to disqualify four badminton pairs is another
& D& q0 \& d, f* |, htopic worth discussing, though probably not in Nature). Ye, on the other
/ C. L8 Z( L8 ?hand, was trailing behind after the first 300 metres and relied on freestyle
& B3 A" ]; I; q+ }; ]- ], in which she has an edge, to win the race. Failing to mention this
' q& T9 m* p/ G, D5 [6 estrategic difference, as well as the fact that Lochte is 23.25 seconds( N* n, u8 G+ u: Q
faster (4:05.18) than Ye overall, creates the illusion that a woman swam
/ m6 }' F/ C$ @- V. S5 F. Qfaster than the best man in the same sport, which sounds impossible. Putting9 \. Z: _" S, K! p! R2 W. F; e% H
aside the gender argument, I believe this is still a leading question that
3 {& m2 \; m: f( Gimplies to the reader that there is something fishy going on.& Q2 F n! N3 K8 V( l I7 _
R* L* M; e+ HFourth is another example of cherry-picking. In the same event, there are
; e K4 V5 n0 T, g" yfour male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93
/ s/ k$ r3 @! S! ~0 _s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s
# p5 w/ Q% R' l), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns
7 X; }" M& d2 \8 Zout, if we are just talking about the last 50 metres in a 400-metre IM,
- _" h# H/ v1 m5 P0 aLochter is not the example I would have used if I were the author. What kind
3 R6 T9 X$ A/ i) T- K4 Z8 a Bof scientific rigorousness is Callaway trying to demonstrate here? Is it
7 k* O/ D6 ]6 {logical that if Lochter is the champion, we should assume that he leads in
% i2 x: ~- W/ V1 Tevery split? That would be a terrible way to teach the public how science
# T8 Z @, E3 \works.
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Fifth is the issue I oppose the most. Callaway quotes Ross Tucker and
' L; M5 h# j: ^, X2 \implies that a drug test cannot rule out the possibility of doping. Is this" `/ P0 |! `3 w4 Q3 L& K8 ~
kind of agnosticism what Nature really wants to teach its readers? By that
; m% c! ]! r u7 l0 ^standard, I estimate that at least half of the peer-reviewed scientific5 K& U! Z5 O. ^7 }! S/ \, t
papers in Nature should be retracted. How can one convince the editors and
# n( i8 U) r8 a) Mreviewers that their proposed theory works for every possible case? One, M' D. ]) h: B7 h* ~/ u( S
cannot. One chooses to apply the theory to typical examples and to6 G" Z1 @! k4 c( i/ T6 }
demonstrate that in (hopefully) all scenarios considered, the theory works9 d* \9 J# P$ N' u; a1 e
to a degree, and that that should warrant publication until a counterexample- s% {, y$ x, }0 K
is found. I could imagine that Callaway has a sceptical mind, which is
9 g4 h6 c# S- D& D {& `" y E2 Ccrucial to scientific thinking, but that would be put to better use if he, a* F( c- q3 d' v* K- m9 e4 `( |
wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly ]$ M" m( O) {4 V7 u6 V
advanced, non-detectable drug that the Chinese have come up with in the
/ D3 E+ r, p# }% V; wpast 4 years (they obviously did not have it in Beijing, otherwise why not
+ Q' U& |: ^; O% d; h: E& |use it and woo the audience at home?), based on data and rational derivation7 `% ?2 x; A S8 ~8 C# }% ]
. This article, however, can be interpreted as saying that all athletes are
, \& w" U6 [/ t0 r$ E" gdoping and the authorities are just not good enough to catch them. That may
3 Z: Z) U+ t; ?8 B* s1 Hbe true, logically, but definitely will not make the case if there is ever a9 v& N- ^3 \8 O
hearing by the governing body for water sports, FINA, to determine if Ye
+ `& y% x/ W P% U C! Dhas doped. To ask whether it is possible to obtain a false negative in a8 B2 L$ U" [- Y& k- t
drug test looks like a rigged question to me. Of course it is possible:
$ U1 H: t5 K8 s0 H5 U/ I8 wother than the athlete taking a drug that the test is not designed to detect
# a6 V! b! P6 n3 q% L, anyone who has taken quantum 101 will tell you that everything is; |2 P T5 k; W+ w/ t1 B
probabilistic in nature, and so there is a probability that the drug in an
6 i1 p$ v7 c, X* Z) G: Rathlete’s system could tunnel out right at the moment of the test. A slight
1 p$ v# @- Z/ R* r' T! Y! _chance it may be, but should we disregard all test results because of it?
; ?* P, C& c+ b, N, z; f( lLet’s be practical and reasonable, and accept that the World Anti-Doping
8 y# T2 h. x' C9 p l- k( Z5 [5 ragency (WADA) is competent at its job. Ye’s urine sample will be stored for
! H$ [. Q1 E6 z( \' q/ Z- N4 yeight years after the contest for future testing as technology advances.
T* [1 ]5 \2 l5 }4 GInnocent until proven guilty, shouldn’t it be?8 c3 ?, @( v) c) A. n
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Sixth, and the last point I would like to make, is that the out-of-
3 X; Q" f& `5 c8 a, v1 Hcompetition drug test is already in effect, which Callaway failed to mention& j) P7 d1 y2 S) u) i
. As noted in the president of WADA’s press release, drug testing for: R) I; U& e% u6 T/ K" d
Olympians began at least six months before the opening of the London
% a6 b) o6 S* R- LOlympics. Furthermore, 107 athletes have been banned from this Olympics for
: X! ?4 w a& ydoping. That may be the reason that “everyone will pass at the Olympic3 e( @1 A1 W4 h3 H8 \ P
games. Hardly anyone fails in competition testing” — those who did dope
5 \7 N& N; B0 @- E' jhave already been caught and sanctioned. Callaway is free to suggest that a( F0 r) k2 t: |6 `8 a% }& P
player could have doped beforehand and fooled the test at the game, but this* X, ?& i3 z2 n! U9 J
possibility is certainly ruled out for Ye." p' S( r+ c% l1 \: i8 u, {
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Over all, even though Callaway did not falsify any data, he did (
0 a. n# s' z6 @intentionally or not) cherry-pick data that, in my view, are far too
$ m9 o5 k2 y' F% Fsuggestive to be fair and unbiased. If you want to cover a story of a
: ]5 D5 W0 s5 [- @$ tsuspected doping from a scientific point of view, be impartial and provide6 a( {$ d1 n. P/ |0 [) K
all the facts for the reader to judge. You are entitled to your4 v' D: I) Q8 z2 _7 X
interpretation of the facts, and the expression thereof in your piece,
' g- [6 E: y, Q" c! [" rexplicitly or otherwise, but showing only evidence that favours your
! Z; a4 R* ]! k) ?4 Dargument is hardly good science or journalism. Such an article in a journal2 S E$ b2 B1 c& c4 n
such as Nature is not an appropriate example of how scientific research or6 Q4 M s8 [; S1 s5 F8 `% A
reporting should be done. |
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