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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
$ U. |9 @* Y, e. }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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% B$ G; ^( i4 y- n, p% e# }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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It is a shame to see Nature — which nearly all scientists, including myself# J. E6 N3 \9 V. T
, regard as one of the most prestigious and influential physical-science l% a7 k' b5 C5 `% k9 |
magazines — publish a thinly veiled biased article like this. Granted, this% f, p' I5 P4 f: I
is not a peer-reviewed scientific article and did not go through the
5 l0 w0 X" w9 V1 A) M( b) fscrutiny of picking referees. But to serve as a channel for the general6 P- ^/ @$ T) s% R
populace to be in touch with and appreciate science, the authors and editors
' D) G2 Z/ b3 B! ]& I% Rshould at least present the readers with facts within the proper context,
8 H* Q7 [, a" p+ Hwhich they blatantly failed to do.
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First, to identify Ye’s performance increase, Ewen Callaway compared her0 |! R0 ?& P# c `
Olympic 400-metre IM time with her performance at the World Championships in
2 \2 M/ s* e0 z: H! ]- D3 j, e' y2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “, `; u ?8 q! c( N: B5 |! ]# g
anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous7 B( a" h2 S* C
personal best was 4:33.79 at the Asian Games in 2010. This leads to an% c% P* d X: _+ @6 H; B
improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the
' }% T6 p) g. ~3 K2 Ldifference between the gold and silver medal, I see no reason for 5.38 s to
' i3 A) y" x* A1 V& Gbe treated as 7 s.! s3 A, @0 v+ c8 ^2 Y% o: n
0 W! n0 O; G( t3 f6 ?Second, as previously pointed out, Ye is only 16 years old and her body is$ L7 z o: t$ P6 B5 z; f
still developing. Bettering oneself by 5 seconds over two years may seem/ l3 @( |- V- g8 n# Z3 q
impossible for an adult swimmer, but it certainly happens among youngsters.- Y- Q- m7 f* w( g
An interview with Australian gold medallist Ian Thorpe revealed that his 400
! { Z d/ J+ H: K2 g* x( ]( y-metre freestyle time improved by 5 seconds between the ages of 15 and 16.$ M( K, X6 y+ I) O9 Z5 v
For regular people, including Callaway, it may be hard to imagine what an; i1 ]1 v# F7 q" ?& M* V8 r
elite swimmer can achieve as he or she matures and undergoes scientific and) q* h% P$ O$ e. v4 [0 K1 T. S
persistent training. But jumping to the conclusion that it is “anomalous”2 `" g; B9 |" p+ M' A! c
based 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* _8 s! i4 c7 p1 w. p" ? l H
example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in
9 r7 f4 {& z& `( i" Othe last 50 metres, but Lochte had a huge lead in the first 300 metres, so6 X1 T0 O+ \9 R9 b6 L5 ]
he chose not to push himself too hard and to conserve his energy for later/ m/ I7 N$ ~& ?) g! E4 |4 e+ V
events (whether this conforms to the Olympic spirit and the ‘use one’s+ F: M0 m z# W5 N6 ]2 [- S
best efforts to win a match’ requirement that the Badminton World/ N+ v. q1 z+ u$ v5 e
Federation recently invoked to disqualify four badminton pairs is another
5 o, g$ P' ~4 Y. j8 n3 W- z5 c8 htopic worth discussing, though probably not in Nature). Ye, on the other# `+ x5 X/ _6 w Z1 `
hand, was trailing behind after the first 300 metres and relied on freestyle
1 G5 G- w, J9 j3 `8 Y* z8 s) p, in which she has an edge, to win the race. Failing to mention this7 O) K" z" o# i! D: B, O
strategic difference, as well as the fact that Lochte is 23.25 seconds
, {7 m5 E @ Q3 A. j8 lfaster (4:05.18) than Ye overall, creates the illusion that a woman swam0 j4 l+ D- t1 a! u
faster than the best man in the same sport, which sounds impossible. Putting
$ G$ t) S4 v1 j1 h8 Q4 ^6 R* K ^aside the gender argument, I believe this is still a leading question that
- {# h6 Z+ u1 nimplies to the reader that there is something fishy going on.
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Fourth is another example of cherry-picking. In the same event, there are+ a0 o* C& J' C2 `& k% J0 |% ^
four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93$ m, ?+ u& k. Z) a: J" G0 O
s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s% q* f" A5 ?4 m4 D2 ^, B
), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns
5 @, q. g1 Q! C6 H1 \out, if we are just talking about the last 50 metres in a 400-metre IM,
% b* ?* L# C# z3 ?+ j/ n; c8 L ILochter is not the example I would have used if I were the author. What kind) Y4 r5 g1 B! n. e& o: Z8 q
of scientific rigorousness is Callaway trying to demonstrate here? Is it, c6 U* b- n( X3 n: o
logical that if Lochter is the champion, we should assume that he leads in
3 E/ @, O( X. _% n# i& C3 Severy split? That would be a terrible way to teach the public how science, I$ p/ _+ B1 ^
works.
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Fifth is the issue I oppose the most. Callaway quotes Ross Tucker and
1 J4 b# l, c. s2 Q: k/ [* J/ Fimplies that a drug test cannot rule out the possibility of doping. Is this1 X3 H' a4 x6 x
kind of agnosticism what Nature really wants to teach its readers? By that
0 \3 P& f- V; V9 m3 A3 K; Q2 zstandard, I estimate that at least half of the peer-reviewed scientific; {. O0 p4 Y4 L1 u7 H
papers in Nature should be retracted. How can one convince the editors and
7 i) u6 G: J0 Treviewers that their proposed theory works for every possible case? One
+ W# G" ^' C0 V& y+ k$ u scannot. One chooses to apply the theory to typical examples and to
+ A4 o; K) n/ I7 T' ^ x9 Jdemonstrate that in (hopefully) all scenarios considered, the theory works L3 Y: E9 N. [& u# o
to a degree, and that that should warrant publication until a counterexample
3 W1 J$ ]; e! w0 }! n7 p- P5 p* @is found. I could imagine that Callaway has a sceptical mind, which is J2 G# k1 D3 D! i
crucial to scientific thinking, but that would be put to better use if he
& ^( ^ C4 C' W, b5 Zwrote a peer-reviewed paper that discussed the odds of Ye doping on a highly5 [( g; y. G5 E" o0 U6 g9 I2 v
advanced, non-detectable drug that the Chinese have come up with in the( g' E0 ^2 M2 |2 p% B6 a( n
past 4 years (they obviously did not have it in Beijing, otherwise why not% N) F! G* N4 r! l. g8 u q
use it and woo the audience at home?), based on data and rational derivation
* x, C$ q1 ^# ?' q) R% G- E! W. This article, however, can be interpreted as saying that all athletes are `9 Q$ j- Y$ ~" e
doping and the authorities are just not good enough to catch them. That may* t3 c* R: v. A# P4 Z
be true, logically, but definitely will not make the case if there is ever a
# b% M" h1 P/ Phearing by the governing body for water sports, FINA, to determine if Ye s3 E" u( X K o
has doped. To ask whether it is possible to obtain a false negative in a
8 e! h1 J9 K6 edrug test looks like a rigged question to me. Of course it is possible:
+ v' \, n" t% G1 bother than the athlete taking a drug that the test is not designed to detect
. p% x& a4 u7 J/ C" j7 H4 ]! V, anyone who has taken quantum 101 will tell you that everything is. _( s Z" F( P! y
probabilistic in nature, and so there is a probability that the drug in an, f5 G& @! v& L# n
athlete’s system could tunnel out right at the moment of the test. A slight
8 b7 k3 {$ F( O6 f2 bchance it may be, but should we disregard all test results because of it?
& p$ ?6 M1 Z' K2 A! D$ [! U2 SLet’s be practical and reasonable, and accept that the World Anti-Doping3 i" R- d( x% ~9 o6 f0 T
agency (WADA) is competent at its job. Ye’s urine sample will be stored for+ v, {- p; j$ m& `2 Q
eight years after the contest for future testing as technology advances.
, E- I3 f9 s0 B0 D; [( H$ ?$ PInnocent until proven guilty, shouldn’t it be?
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Sixth, and the last point I would like to make, is that the out-of-
: ^- s: Y' s2 S- {9 n5 Z2 m7 }3 r# H5 ecompetition drug test is already in effect, which Callaway failed to mention
6 y, o& L7 L6 U2 z% D. As noted in the president of WADA’s press release, drug testing for
( J9 F/ k- X4 V: E' _7 ]* ~Olympians began at least six months before the opening of the London
' j5 u/ s/ y/ `* ~, l. rOlympics. Furthermore, 107 athletes have been banned from this Olympics for
' n8 H' J) `) X7 Vdoping. That may be the reason that “everyone will pass at the Olympic7 h0 h, C1 u+ |* Z- {: S+ r, y
games. Hardly anyone fails in competition testing” — those who did dope
3 z! ?4 k N" h% q! Zhave already been caught and sanctioned. Callaway is free to suggest that a
/ ~$ S. F9 E' m" X0 lplayer could have doped beforehand and fooled the test at the game, but this
* ~8 @: s; W0 `3 ]3 r' y/ t' ?2 opossibility is certainly ruled out for Ye.
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/ [& ~+ u+ [/ _2 p5 T l- v5 t; _Over all, even though Callaway did not falsify any data, he did (
/ w7 ?' n& q: N4 j5 R8 r* Iintentionally or not) cherry-pick data that, in my view, are far too+ ?0 j+ Y$ |6 n
suggestive to be fair and unbiased. If you want to cover a story of a% [- K) E* m! j$ Z. y- e
suspected doping from a scientific point of view, be impartial and provide
2 a, y* J- {8 }0 j6 T- ]all the facts for the reader to judge. You are entitled to your! D* o" h1 z- q# r2 F3 y6 H
interpretation of the facts, and the expression thereof in your piece,
* E n: |$ X2 @+ j$ pexplicitly or otherwise, but showing only evidence that favours your8 Z. V) O; q' L5 D
argument is hardly good science or journalism. Such an article in a journal' |; k: e" _) U! b
such as Nature is not an appropriate example of how scientific research or3 p4 u# Y" u* I1 T# s7 f6 ?
reporting should be done. |
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