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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
! ^ `4 D- b7 i) M& x, W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# m2 e1 V7 |# e
9 A/ ^* P6 }, `, ^ k0 {FROM LAI JIANG, Department of Chemistry, University of Pennsylvania% x9 D: x3 g! t
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It is a shame to see Nature — which nearly all scientists, including myself
9 U) H8 G' H# R% f, regard as one of the most prestigious and influential physical-science
i/ y+ _3 l* x6 O) |1 _magazines — publish a thinly veiled biased article like this. Granted, this
, R3 Z( \: |- k/ h9 W( @7 k9 ~is not a peer-reviewed scientific article and did not go through the
' D3 ~; f7 ^6 G+ C5 g3 wscrutiny of picking referees. But to serve as a channel for the general
1 g& K1 A( s' K5 J- R6 m9 l6 @populace to be in touch with and appreciate science, the authors and editors
6 P) W" l& g! b7 |9 j g6 Ishould at least present the readers with facts within the proper context,) ?0 N/ I8 u9 u6 ~% e
which they blatantly failed to do./ A0 _) _+ K+ ^3 ^- i+ d
+ P" A) V! g: RFirst, to identify Ye’s performance increase, Ewen Callaway compared her/ b! N, h& z) x& L
Olympic 400-metre IM time with her performance at the World Championships in2 S7 E2 X; N# I& f
2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “
1 f1 m" Y$ g! C8 R( M1 Canomalous” improvement of around 7 seconds (6.72 s). In fact, her previous F8 e9 W" x1 j9 A: G
personal best was 4:33.79 at the Asian Games in 2010. This leads to an
+ ?- C+ o6 e5 @. Z6 y# i- v4 Kimprovement of 5.38 seconds. In a sporting event in which 0.1 s can be the
! ]0 V9 o1 b3 l# x6 g9 gdifference between the gold and silver medal, I see no reason for 5.38 s to
% a' _8 ]1 G1 I% zbe treated as 7 s.3 u) g- F+ t9 C: Z8 f
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Second, as previously pointed out, Ye is only 16 years old and her body is) G, F1 l `( u3 a2 }* q' T5 d
still developing. Bettering oneself by 5 seconds over two years may seem
8 M2 M/ k. i/ G/ Bimpossible for an adult swimmer, but it certainly happens among youngsters.
$ D; f, {$ D9 G0 `/ W& z- p# f5 VAn interview with Australian gold medallist Ian Thorpe revealed that his 400
; r. |4 n L+ Y5 b9 g: x+ |" ~-metre freestyle time improved by 5 seconds between the ages of 15 and 16.
3 p; w! x, n5 a- ?. r bFor regular people, including Callaway, it may be hard to imagine what an( X+ j" O& X* V" W; k1 a' H
elite swimmer can achieve as he or she matures and undergoes scientific and
# f, |8 m2 ?# v* Y: ?; w; ~persistent training. But jumping to the conclusion that it is “anomalous”
# m' X9 d% q8 K: _based on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.0 p9 f' u& w! P& t
# s M' F6 c7 O! X) FThird, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook. T, h, l8 z# [( c
example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in
$ e4 i' x( j6 g2 Z* ?the last 50 metres, but Lochte had a huge lead in the first 300 metres, so4 t! x* R/ |! a2 ^; e
he chose not to push himself too hard and to conserve his energy for later
5 F& \) c' `( V9 ^; Q. eevents (whether this conforms to the Olympic spirit and the ‘use one’s2 d& v D- _* U) a( D9 d
best efforts to win a match’ requirement that the Badminton World
# s+ @( f, G# TFederation recently invoked to disqualify four badminton pairs is another
. T) J% L' o. _- j8 Btopic worth discussing, though probably not in Nature). Ye, on the other
$ q0 _8 a* h5 C7 w" r L4 j" Khand, was trailing behind after the first 300 metres and relied on freestyle
% E( c! l8 Z! k* [, A5 m, in which she has an edge, to win the race. Failing to mention this& l5 E" E4 u6 |0 D: H* L K5 D: U8 K
strategic difference, as well as the fact that Lochte is 23.25 seconds
* s( ^6 K+ q/ dfaster (4:05.18) than Ye overall, creates the illusion that a woman swam, x7 B2 R+ J2 `6 w
faster than the best man in the same sport, which sounds impossible. Putting [4 u F/ k8 y- `
aside the gender argument, I believe this is still a leading question that% h! W( {# a$ b+ B7 ~" c( O
implies to the reader that there is something fishy going on.& `" a& \1 P& a: `6 e7 Q( p6 T! E
. U* w+ I$ }, ?0 P. i4 VFourth is another example of cherry-picking. In the same event, there are
3 v- A1 L+ \* J1 m% \four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.939 G: m+ ~$ a! I9 R9 L5 E0 z
s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s
: i* M1 q& d0 Q$ M), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns2 a" d9 C$ Z/ Z/ y
out, if we are just talking about the last 50 metres in a 400-metre IM,
, t& W9 h% W# ]9 _! D/ \Lochter is not the example I would have used if I were the author. What kind* V7 V8 C4 `' L4 _ B' c
of scientific rigorousness is Callaway trying to demonstrate here? Is it
, s; \- h" P3 W5 r$ Rlogical that if Lochter is the champion, we should assume that he leads in- D+ b Y% [2 w
every split? That would be a terrible way to teach the public how science
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Fifth is the issue I oppose the most. Callaway quotes Ross Tucker and
z9 J* k( ~8 M2 D- e! [implies that a drug test cannot rule out the possibility of doping. Is this; Q) g8 a6 Y) \ ]' v( r7 @
kind of agnosticism what Nature really wants to teach its readers? By that$ B' m+ |: { a4 k) M* A
standard, I estimate that at least half of the peer-reviewed scientific
' H; }6 j+ G1 _6 R# x7 o' R2 S5 Ipapers in Nature should be retracted. How can one convince the editors and( J$ D3 j$ y, C1 S) Q
reviewers that their proposed theory works for every possible case? One
/ A& d1 s3 g& h2 @& M* ~, c- L* mcannot. One chooses to apply the theory to typical examples and to
5 x4 o: C; F+ b; o; x0 Odemonstrate that in (hopefully) all scenarios considered, the theory works' e3 @5 ?% H5 J2 b) H
to a degree, and that that should warrant publication until a counterexample$ e! P" L" s! Z" H7 e3 F% G
is found. I could imagine that Callaway has a sceptical mind, which is, z( s0 g: Y# @; B4 I
crucial to scientific thinking, but that would be put to better use if he
- F! [, n! W6 \5 T3 fwrote a peer-reviewed paper that discussed the odds of Ye doping on a highly
" r) M7 O0 G6 L9 a9 ^0 Y/ H* jadvanced, non-detectable drug that the Chinese have come up with in the9 z7 T8 a0 Z2 Z
past 4 years (they obviously did not have it in Beijing, otherwise why not
5 ~+ f* @8 ]) \& uuse it and woo the audience at home?), based on data and rational derivation, m; i v( Y8 ]5 ^& w" H
. This article, however, can be interpreted as saying that all athletes are
3 r9 j# p( n3 R) Idoping and the authorities are just not good enough to catch them. That may5 g( f: ~% z0 B2 A8 e
be true, logically, but definitely will not make the case if there is ever a
+ T$ Z7 Q" f8 ?hearing by the governing body for water sports, FINA, to determine if Ye( R+ q! M, I4 v9 [; y
has doped. To ask whether it is possible to obtain a false negative in a
# F6 C# _! Y. I* O: d1 ddrug test looks like a rigged question to me. Of course it is possible:' o! H8 L2 }2 ?: |# j7 r: `
other than the athlete taking a drug that the test is not designed to detect y' M. C2 O2 P- K8 I! E# I
, anyone who has taken quantum 101 will tell you that everything is# A! L- y- Z) }: a6 j8 A( s
probabilistic in nature, and so there is a probability that the drug in an& h. F7 ^$ U5 Q9 i y! b
athlete’s system could tunnel out right at the moment of the test. A slight+ L* D7 O/ [4 A+ K6 a& ?
chance it may be, but should we disregard all test results because of it?! v: v& S5 v/ u+ L: {9 u
Let’s be practical and reasonable, and accept that the World Anti-Doping% ~* c8 V: @* `/ U0 R# ], f
agency (WADA) is competent at its job. Ye’s urine sample will be stored for+ Z5 _2 ^/ f0 t, m" g; l& `0 n
eight years after the contest for future testing as technology advances.
: T9 g5 H$ ]3 {1 f1 [9 p+ uInnocent 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-' {" U9 c+ {& q" [7 g! A
competition drug test is already in effect, which Callaway failed to mention, O6 m8 r1 o6 Y5 p( P1 f
. As noted in the president of WADA’s press release, drug testing for( X, Y) p6 Z2 A2 k+ q: X- m$ H
Olympians began at least six months before the opening of the London
$ x% ~9 q6 v! ~/ ~Olympics. Furthermore, 107 athletes have been banned from this Olympics for
# a; x; {4 O; [! X Jdoping. That may be the reason that “everyone will pass at the Olympic
0 V3 x+ `; N$ r' R- zgames. Hardly anyone fails in competition testing” — those who did dope
. B4 I- J. q" ~4 Y. v8 Zhave already been caught and sanctioned. Callaway is free to suggest that a4 ~ k8 w8 ]6 D. O* t2 n/ G! N
player could have doped beforehand and fooled the test at the game, but this5 ?1 W7 P; c, Z, `' Z
possibility is certainly ruled out for Ye.
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3 L* q4 u) e2 d0 jOver all, even though Callaway did not falsify any data, he did (
/ ]# ?" }* D. s2 bintentionally or not) cherry-pick data that, in my view, are far too9 f+ _2 D2 ~) u: C1 f) z
suggestive to be fair and unbiased. If you want to cover a story of a) X1 V' m& n2 G5 ]2 N
suspected doping from a scientific point of view, be impartial and provide7 \) Z3 \5 f& \ ^
all the facts for the reader to judge. You are entitled to your- ~6 H* \* g, ]9 }
interpretation of the facts, and the expression thereof in your piece,- X2 G0 \7 F8 r; i
explicitly or otherwise, but showing only evidence that favours your
. e% L- S. u% B8 P6 ~# l# B" V: {$ Q! sargument is hardly good science or journalism. Such an article in a journal
# S; k: c" l3 x" ]. d h5 Y4 u: g. L; qsuch as Nature is not an appropriate example of how scientific research or
* b6 g7 t* Z/ Zreporting should be done. |
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