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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
% |6 v9 c* G1 N) ?. A6 U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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http://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html* o7 S$ a- [8 l* `$ v1 g
! Z; X) R' K- Y6 G. R9 MFROM LAI JIANG, Department of Chemistry, University of Pennsylvania) X6 Z% ` r' N" O4 M
4 K* B: z3 y! U* X4 @2 M, |+ YIt is a shame to see Nature — which nearly all scientists, including myself% H5 J. d- O$ A$ v
, regard as one of the most prestigious and influential physical-science r/ x3 M# p( i9 @
magazines — publish a thinly veiled biased article like this. Granted, this+ v7 |- J( i. e6 D" Q7 v
is not a peer-reviewed scientific article and did not go through the& q( ~# i1 k, `* |! Q# h
scrutiny of picking referees. But to serve as a channel for the general! p" m+ b! T$ B* c# Q) w
populace to be in touch with and appreciate science, the authors and editors3 c' ^8 P/ n, l9 l" _& |) G. P
should at least present the readers with facts within the proper context,
! f" B: l3 B" Zwhich they blatantly failed to do.
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# |" | s5 ]! h/ t2 c0 bFirst, to identify Ye’s performance increase, Ewen Callaway compared her& A q& c7 K9 O3 s# L: ` f% Q
Olympic 400-metre IM time with her performance at the World Championships in0 X+ h6 ]* W9 c( C, c
2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “
$ F7 z, F3 p( R* n/ F' b& s9 l& Panomalous” improvement of around 7 seconds (6.72 s). In fact, her previous, `& r5 E( E& `: @* B+ @
personal best was 4:33.79 at the Asian Games in 2010. This leads to an
+ Z/ ~6 P3 E! s- wimprovement of 5.38 seconds. In a sporting event in which 0.1 s can be the* B7 Y1 K6 ?8 I0 K2 r7 N5 E
difference between the gold and silver medal, I see no reason for 5.38 s to( D* A. c# a: I$ M
be treated as 7 s.
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& J, `2 w8 }7 f( P1 E- USecond, as previously pointed out, Ye is only 16 years old and her body is
( d- K) H" H7 r4 f8 h3 T) v Tstill developing. Bettering oneself by 5 seconds over two years may seem
; j: M8 p$ b; L) j! ^2 Himpossible for an adult swimmer, but it certainly happens among youngsters.
$ w, ^7 H6 M: i: T( UAn interview with Australian gold medallist Ian Thorpe revealed that his 400
& x" ~6 ~3 D. T) A$ b-metre freestyle time improved by 5 seconds between the ages of 15 and 16.
1 R0 U( P9 M$ Y% W& GFor regular people, including Callaway, it may be hard to imagine what an) X K# X, e& ?
elite swimmer can achieve as he or she matures and undergoes scientific and
; S6 `* T. v( o/ [& zpersistent training. But jumping to the conclusion that it is “anomalous”
" _7 l+ n, [; @1 a: s0 t* ]% Fbased on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.$ A9 ^# a( P+ T( v
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Third, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook2 |5 a( \* k( N
example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in8 L) O: b& `# a8 w1 c& B
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so1 o$ b4 I7 F G) U7 Z
he chose not to push himself too hard and to conserve his energy for later
( V! }( d2 s7 @- Uevents (whether this conforms to the Olympic spirit and the ‘use one’s$ t3 M- F" j! p1 Q! @) K
best efforts to win a match’ requirement that the Badminton World
+ U6 K4 o! E q3 m, |4 I H k" q6 _7 KFederation recently invoked to disqualify four badminton pairs is another& E) n6 Z. N4 N9 m3 A
topic worth discussing, though probably not in Nature). Ye, on the other- q o u. K4 j0 V9 N
hand, was trailing behind after the first 300 metres and relied on freestyle
) Y* U& C! J9 N) E, in which she has an edge, to win the race. Failing to mention this8 t# n7 A8 T3 r& y, l$ O
strategic difference, as well as the fact that Lochte is 23.25 seconds8 m9 v: _ W$ e3 e
faster (4:05.18) than Ye overall, creates the illusion that a woman swam
7 c+ C6 p( P) q# v; {9 Gfaster than the best man in the same sport, which sounds impossible. Putting
- j) e* F0 ~8 Z6 Uaside the gender argument, I believe this is still a leading question that
+ t ^. K' @% v% ^ himplies to the reader that there is something fishy going on.% E" ]8 g9 L6 M
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Fourth is another example of cherry-picking. In the same event, there are
) B+ z( x# z2 \- Y2 Z$ efour male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93+ r8 H4 M# \: F+ m' H3 @+ B
s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s& a3 U0 `7 r6 q0 J& \4 [
), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns: I( w% b7 X7 \# ~, h
out, if we are just talking about the last 50 metres in a 400-metre IM,4 n( i3 a5 ~4 {9 a
Lochter is not the example I would have used if I were the author. What kind+ {* F' B; n( C* J
of scientific rigorousness is Callaway trying to demonstrate here? Is it
, m2 b: L6 j! a6 L( Alogical that if Lochter is the champion, we should assume that he leads in
& J4 o+ g! T* c, v# G7 ^every split? That would be a terrible way to teach the public how science
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; `1 v4 x7 Q9 @# d( VFifth is the issue I oppose the most. Callaway quotes Ross Tucker and4 J+ u5 Q, _. Y, h3 S! p
implies that a drug test cannot rule out the possibility of doping. Is this# w" Y1 h5 w/ `8 d9 \) e
kind of agnosticism what Nature really wants to teach its readers? By that+ B l$ S/ D2 z9 Y
standard, I estimate that at least half of the peer-reviewed scientific$ u- \3 x N2 s* I
papers in Nature should be retracted. How can one convince the editors and" K6 ^* L* I7 G. L* f8 a
reviewers that their proposed theory works for every possible case? One
( A6 q6 |, |- }& Acannot. One chooses to apply the theory to typical examples and to. x. @! S9 I% D( ?. o4 ^2 x
demonstrate that in (hopefully) all scenarios considered, the theory works2 J* _5 Y8 K3 K* f6 U4 d) a! x
to a degree, and that that should warrant publication until a counterexample' O# Q) e/ \8 ?! |
is found. I could imagine that Callaway has a sceptical mind, which is
7 H5 k; O d2 G! ~. j) Wcrucial to scientific thinking, but that would be put to better use if he) l# G+ M/ K$ T, L- B
wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly9 b/ t* ?2 F2 Q/ ^( u- Q
advanced, non-detectable drug that the Chinese have come up with in the# V; C& X% e' @6 O- q
past 4 years (they obviously did not have it in Beijing, otherwise why not3 q8 q1 W0 D& [+ i" p9 F/ t$ O. ?
use it and woo the audience at home?), based on data and rational derivation" J5 ~2 A/ p! W0 H% {2 Z9 D0 e$ c
. This article, however, can be interpreted as saying that all athletes are9 c0 l0 \& W2 X2 a( A" y: T6 b
doping and the authorities are just not good enough to catch them. That may
6 a: Z S0 v1 m; a( j; X8 w" ~be true, logically, but definitely will not make the case if there is ever a
& j8 g+ Z \3 s; W* |2 B9 X( xhearing by the governing body for water sports, FINA, to determine if Ye
0 o0 c7 Q$ s& A0 uhas doped. To ask whether it is possible to obtain a false negative in a
9 U& ^9 N8 E. l! @/ x6 ndrug test looks like a rigged question to me. Of course it is possible:' J. f' A; ~, e% l1 J- b. ?( t
other than the athlete taking a drug that the test is not designed to detect& s9 R4 O7 u* q$ l% A5 J! P* U
, anyone who has taken quantum 101 will tell you that everything is3 K5 A8 a; P) B- ~6 _. [- x
probabilistic in nature, and so there is a probability that the drug in an
" A" Q* \) b* Oathlete’s system could tunnel out right at the moment of the test. A slight Y3 A: k' l& i: Y7 F
chance it may be, but should we disregard all test results because of it?& e4 q0 v, X, y/ w% H
Let’s be practical and reasonable, and accept that the World Anti-Doping
; @7 q% p8 K3 A- s7 Oagency (WADA) is competent at its job. Ye’s urine sample will be stored for
& i) }$ g5 L# Q4 x, Veight years after the contest for future testing as technology advances., I% @3 R$ s4 ~: L$ t
Innocent until proven guilty, shouldn’t it be?" K$ u8 e y( h, ~" {* c
5 X/ g P; P2 P2 r6 j# Y2 SSixth, and the last point I would like to make, is that the out-of-% r$ ?# }& O0 }) S+ ^
competition drug test is already in effect, which Callaway failed to mention
" Z! [. Q$ S5 [" B' y. As noted in the president of WADA’s press release, drug testing for" B: R: g; a* ~/ ], [# O
Olympians began at least six months before the opening of the London, r% c# M" j- B4 Z' C8 O! ]
Olympics. Furthermore, 107 athletes have been banned from this Olympics for" O% O) P/ B! L; G
doping. That may be the reason that “everyone will pass at the Olympic" D2 i( r6 O, O! Y- z
games. Hardly anyone fails in competition testing” — those who did dope4 p! C" K& q( q3 A8 T. _1 t, S
have already been caught and sanctioned. Callaway is free to suggest that a
4 ~6 ` y8 e2 N+ Rplayer could have doped beforehand and fooled the test at the game, but this% o h* M9 S6 o1 I# R
possibility is certainly ruled out for Ye.
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# P) ^4 y, Q: [Over all, even though Callaway did not falsify any data, he did (- [& N' d* S. t) Q9 y, m* m1 I
intentionally or not) cherry-pick data that, in my view, are far too
& s% F) H1 B- f( V& h% Lsuggestive to be fair and unbiased. If you want to cover a story of a; u: V7 _# U% B
suspected doping from a scientific point of view, be impartial and provide3 u2 F% J* t( {- s6 v
all the facts for the reader to judge. You are entitled to your
+ B% a- ]* W% g) @3 v6 vinterpretation of the facts, and the expression thereof in your piece,
' Z# m/ H' A4 a) N* s* l6 r; Gexplicitly or otherwise, but showing only evidence that favours your
8 o7 J) w; D$ }argument is hardly good science or journalism. Such an article in a journal* W6 E8 z6 M# v1 h% q
such as Nature is not an appropriate example of how scientific research or9 Z1 K9 |! O) d( o& D/ t. N
reporting should be done. |
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