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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
7 O6 x& z5 z0 N0 M2 m* C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
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* e/ u' i n8 h5 HFROM LAI JIANG, Department of Chemistry, University of Pennsylvania. F: X& m* W+ [$ m6 a; s
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It is a shame to see Nature — which nearly all scientists, including myself
6 }, B; k( v: _8 L2 i& H, regard as one of the most prestigious and influential physical-science
6 Z* |) ~, W# y& V+ v0 t' `- Jmagazines — publish a thinly veiled biased article like this. Granted, this
9 T+ ]% _" T" ^is not a peer-reviewed scientific article and did not go through the( l6 A" }8 x0 D3 W5 Y) v
scrutiny of picking referees. But to serve as a channel for the general
4 y, W9 c) m3 ~: ]populace to be in touch with and appreciate science, the authors and editors/ Q4 r, }" |5 d. u2 O' i- j
should at least present the readers with facts within the proper context,
/ T9 x1 K: i/ Q& O& n% J! s' Mwhich they blatantly failed to do.+ u# W3 U4 k1 Q2 M0 I R
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First, to identify Ye’s performance increase, Ewen Callaway compared her3 A# C- a( V) w6 b3 |
Olympic 400-metre IM time with her performance at the World Championships in1 j3 Q1 \: F" m$ E% `
2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “8 B. ?1 Y8 o/ T
anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous
7 }- I4 V, d2 J' m( e! Ypersonal best was 4:33.79 at the Asian Games in 2010. This leads to an) @. a2 D% d7 W/ R, A/ I# g# F7 T
improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the
P' U. U W9 U$ d$ pdifference between the gold and silver medal, I see no reason for 5.38 s to, K. ?, W: @( [( I' b- @$ F
be treated as 7 s.6 `9 L$ m; n; W2 \) C3 Z2 s
/ s+ ]) o0 ^ y* wSecond, as previously pointed out, Ye is only 16 years old and her body is) [' \: @2 a( L" e# w
still developing. Bettering oneself by 5 seconds over two years may seem8 S C# {) d5 f
impossible for an adult swimmer, but it certainly happens among youngsters.
! T0 _( @( R# ?3 e! E0 t" W2 ]An interview with Australian gold medallist Ian Thorpe revealed that his 400+ [0 E2 f- d% u1 Z- G8 H& |
-metre freestyle time improved by 5 seconds between the ages of 15 and 16.* }$ E# x- b/ B+ i& Z
For regular people, including Callaway, it may be hard to imagine what an, P3 A8 |( \6 n o# c, l
elite swimmer can achieve as he or she matures and undergoes scientific and
( L" D: x: _% K. mpersistent training. But jumping to the conclusion that it is “anomalous”* t4 w4 L% ~6 X$ e2 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+ `% J" B: N; k6 i- U4 ~3 w" v1 Y
example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in, T9 ?0 ?' y5 R' A) n$ S- T9 L
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so
" ?" P8 k5 K" }( e. The chose not to push himself too hard and to conserve his energy for later( a' T m, k0 @8 G
events (whether this conforms to the Olympic spirit and the ‘use one’s2 y+ N2 Y; |& q/ g+ Z, o5 a
best efforts to win a match’ requirement that the Badminton World! o/ }" N8 a9 c: a0 P% R" A9 ~
Federation recently invoked to disqualify four badminton pairs is another2 n* L+ y6 G5 V7 G+ I8 l
topic worth discussing, though probably not in Nature). Ye, on the other
4 G4 ~( W; T, [9 t4 Ihand, was trailing behind after the first 300 metres and relied on freestyle9 ]2 n$ }( p8 {5 O( U! L. t
, in which she has an edge, to win the race. Failing to mention this
6 ?; H$ M" s: b' \( N& M/ B$ [strategic difference, as well as the fact that Lochte is 23.25 seconds; E/ `$ A( \1 D$ \7 v6 A" X d' Z
faster (4:05.18) than Ye overall, creates the illusion that a woman swam
& v0 R' E+ L7 p% Y1 u; Yfaster than the best man in the same sport, which sounds impossible. Putting/ U0 D- n5 `% @0 O* {: X
aside the gender argument, I believe this is still a leading question that
; O- @% V3 ]7 {& Uimplies to the reader that there is something fishy going on. w9 W& ~9 O( q! x4 D' P
# R( c4 E8 g: I) {6 @Fourth is another example of cherry-picking. In the same event, there are
8 O# A. P. }; K- i5 c- H6 afour male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93
: C3 r; w4 A8 |/ f3 B, bs) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s
6 j* |, i- u+ U( B9 N) u! r& g- z% w* U), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns
) M1 c! g' h9 }( X. ~, Aout, if we are just talking about the last 50 metres in a 400-metre IM,* w5 z& e* f4 ~9 o) x
Lochter is not the example I would have used if I were the author. What kind
9 x' K) i$ s2 W2 A6 r' Gof scientific rigorousness is Callaway trying to demonstrate here? Is it
3 ~: g7 U/ i: F" Alogical that if Lochter is the champion, we should assume that he leads in
* u$ G# t# x. ~4 W- c7 pevery split? That would be a terrible way to teach the public how science
& Y, K I+ i0 K/ Oworks.
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Fifth is the issue I oppose the most. Callaway quotes Ross Tucker and
! |% B: W& _) Vimplies that a drug test cannot rule out the possibility of doping. Is this
3 K0 r! I7 c' ]1 h$ M( ykind of agnosticism what Nature really wants to teach its readers? By that
. }' B, U' R4 Y! |% w$ Ystandard, I estimate that at least half of the peer-reviewed scientific5 u3 @, n \- z7 Z2 `* v& T x
papers in Nature should be retracted. How can one convince the editors and! t) }+ `3 S2 `$ G
reviewers that their proposed theory works for every possible case? One
' B1 S5 Z) g, {, y K( z! Z: q( c$ gcannot. One chooses to apply the theory to typical examples and to
9 R/ A$ w7 G0 h) Y4 {( I0 R2 [demonstrate that in (hopefully) all scenarios considered, the theory works
+ k/ o$ A( K+ Sto a degree, and that that should warrant publication until a counterexample8 L* y# o( S! s `7 z: h
is found. I could imagine that Callaway has a sceptical mind, which is: w2 Z4 e; R! f5 p/ v) Z
crucial to scientific thinking, but that would be put to better use if he5 S/ y# }( p' E& L. K
wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly K! _2 _8 n+ B8 _! w$ C; e, D
advanced, non-detectable drug that the Chinese have come up with in the8 l7 @6 C$ e! G, q, v
past 4 years (they obviously did not have it in Beijing, otherwise why not
6 I& o- r% A7 z4 Uuse it and woo the audience at home?), based on data and rational derivation
+ p' Q7 P! ]/ u! M3 M3 C+ i' X. This article, however, can be interpreted as saying that all athletes are5 W! c o% S" J
doping and the authorities are just not good enough to catch them. That may' u4 Z! J0 n' o8 ]; _# A$ ]
be true, logically, but definitely will not make the case if there is ever a
I/ K# u2 R2 `6 \8 y2 \hearing by the governing body for water sports, FINA, to determine if Ye
v8 N' I0 |. x5 rhas doped. To ask whether it is possible to obtain a false negative in a+ @- `0 ]( T; s2 N5 ]' T& y1 T
drug test looks like a rigged question to me. Of course it is possible:
9 ]% [$ { |$ D" |other than the athlete taking a drug that the test is not designed to detect
" Q$ |% X6 [3 e+ y( m, anyone who has taken quantum 101 will tell you that everything is
2 R# V3 j: V2 d0 h* Pprobabilistic in nature, and so there is a probability that the drug in an
$ v& E. q* M2 [athlete’s system could tunnel out right at the moment of the test. A slight' d% Q9 \- x6 u3 m/ c
chance it may be, but should we disregard all test results because of it?) ?/ X4 m/ ^8 A) o4 K. d0 u
Let’s be practical and reasonable, and accept that the World Anti-Doping
& i' X( u7 @) s/ a/ X3 cagency (WADA) is competent at its job. Ye’s urine sample will be stored for9 j+ v8 q1 s4 O' {5 }
eight years after the contest for future testing as technology advances.
; i' _+ _3 c9 y. E& I0 pInnocent until proven guilty, shouldn’t it be?0 S: r3 @6 x7 u# D: V- i
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Sixth, and the last point I would like to make, is that the out-of-0 D* b, U' q7 r2 `
competition drug test is already in effect, which Callaway failed to mention7 s8 k$ [1 C" d3 \0 Z b* n$ P9 m
. As noted in the president of WADA’s press release, drug testing for; _' M/ N9 M9 p+ Q
Olympians began at least six months before the opening of the London% m6 _$ Y3 [" y+ c
Olympics. Furthermore, 107 athletes have been banned from this Olympics for
) i0 [3 v( T' n ~0 Sdoping. That may be the reason that “everyone will pass at the Olympic+ r4 x. S( o* U
games. Hardly anyone fails in competition testing” — those who did dope
* p3 }1 R! n+ ?( ehave already been caught and sanctioned. Callaway is free to suggest that a! K& L6 M% R8 L+ b& l1 c; H' f
player could have doped beforehand and fooled the test at the game, but this
& H1 c$ h# V; g* hpossibility is certainly ruled out for Ye.' |/ q+ d3 A8 v' Q8 E3 E; B1 }' g
9 ]+ i& J9 b/ u" SOver all, even though Callaway did not falsify any data, he did (
3 }7 `+ ~! S' |3 L+ U' ]+ Lintentionally or not) cherry-pick data that, in my view, are far too7 ]3 N# O# Y% @4 K
suggestive to be fair and unbiased. If you want to cover a story of a9 ?7 k# ?! E5 p j
suspected doping from a scientific point of view, be impartial and provide
$ P0 J( V) X( Vall the facts for the reader to judge. You are entitled to your
% g H) W ]0 Q7 k, | }; {# X# @interpretation of the facts, and the expression thereof in your piece,
% _; I( L+ k6 h* Sexplicitly or otherwise, but showing only evidence that favours your
3 ~4 m+ h k M' ?$ W' r& [# Zargument is hardly good science or journalism. Such an article in a journal
% g7 C% C j$ V" Msuch as Nature is not an appropriate example of how scientific research or6 A) v' b- `% \9 b$ E3 s& [
reporting should be done. |
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