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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
! ?; }2 q) M. c9 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
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FROM LAI JIANG, Department of Chemistry, University of Pennsylvania n) k; s: i4 q9 p# `9 { w
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It is a shame to see Nature — which nearly all scientists, including myself
0 l+ d+ I# w/ [3 l H5 B9 ~, regard as one of the most prestigious and influential physical-science
) q! D$ z6 J! Z$ _+ r" c$ x. vmagazines — publish a thinly veiled biased article like this. Granted, this! b0 a3 b' S! R5 J5 H# Q
is not a peer-reviewed scientific article and did not go through the+ _% X; X8 I( Z* _
scrutiny of picking referees. But to serve as a channel for the general
# f. B8 a9 Z, ?$ _+ [, f5 @$ ~populace to be in touch with and appreciate science, the authors and editors
( t) y" F4 [1 a6 \should at least present the readers with facts within the proper context,7 i* E, U' n$ f2 ~6 l
which they blatantly failed to do.
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; H4 ~7 r _! ]7 }9 h1 eFirst, to identify Ye’s performance increase, Ewen Callaway compared her
5 c" }& m: k( x$ v* z# i. M# dOlympic 400-metre IM time with her performance at the World Championships in
( t5 v% k2 C u) Q8 d2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “% \# _, t! P* O) J( {+ ?) D
anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous' Y% ]8 d1 p) `7 a# U1 M
personal best was 4:33.79 at the Asian Games in 2010. This leads to an
$ z0 `* }+ \1 B4 d$ @improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the4 u0 `% D3 ?* f' i# V# V' N
difference between the gold and silver medal, I see no reason for 5.38 s to
- ?8 S/ ^4 J7 \- Q) Ibe treated as 7 s.
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Second, as previously pointed out, Ye is only 16 years old and her body is7 K" H9 |4 p. ]
still developing. Bettering oneself by 5 seconds over two years may seem
, G# X8 Q+ P# \4 j# y! I iimpossible for an adult swimmer, but it certainly happens among youngsters.! c# N( R2 v* T( r
An interview with Australian gold medallist Ian Thorpe revealed that his 400
8 r' I% d3 x5 w9 y* y5 w-metre freestyle time improved by 5 seconds between the ages of 15 and 16.) c$ s) d/ D6 m" a. u* q$ K
For regular people, including Callaway, it may be hard to imagine what an
; I3 o$ B- N1 F# Qelite swimmer can achieve as he or she matures and undergoes scientific and, l% E- e* y, ~/ ?2 |, j
persistent training. But jumping to the conclusion that it is “anomalous”
% } A8 {' e; ^' v* T2 ebased 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
$ @* ]7 c$ x" o1 h$ Oexample of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in
2 w e1 M7 b1 K+ ? ]the last 50 metres, but Lochte had a huge lead in the first 300 metres, so' I( K4 h! ?* j
he chose not to push himself too hard and to conserve his energy for later4 p; ^$ C6 V$ J) p+ F' e% x1 r
events (whether this conforms to the Olympic spirit and the ‘use one’s6 ?3 X2 H7 g0 x+ H) ]
best efforts to win a match’ requirement that the Badminton World
, ^0 e% }9 i: B' U/ L2 x2 xFederation recently invoked to disqualify four badminton pairs is another5 D1 r$ d$ G! X; ?
topic worth discussing, though probably not in Nature). Ye, on the other
+ n3 _& I4 [) H) N6 J5 |4 x) Khand, was trailing behind after the first 300 metres and relied on freestyle3 V3 r, { D4 ]
, in which she has an edge, to win the race. Failing to mention this: ^( m f# k4 n& k! _
strategic difference, as well as the fact that Lochte is 23.25 seconds4 Y7 l( d0 `5 h7 M ?$ C1 f
faster (4:05.18) than Ye overall, creates the illusion that a woman swam4 w, p( v9 ]4 u8 E& {
faster than the best man in the same sport, which sounds impossible. Putting
, r0 R8 H8 q) I: {& d) r! zaside the gender argument, I believe this is still a leading question that, L4 }/ q7 m a) c' H; j# l
implies to the reader that there is something fishy going on.* z, x8 _% I1 A
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Fourth is another example of cherry-picking. In the same event, there are7 M |( ^/ K$ U6 e- \
four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93) V: F6 @3 K$ D% n7 s
s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s
# ^2 K+ k1 S) T- t! v), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns
: s! b1 j' H! Hout, if we are just talking about the last 50 metres in a 400-metre IM,6 C, s& M; L$ [9 n. ~1 W1 @
Lochter is not the example I would have used if I were the author. What kind
T6 o3 i. f' Y. P- }6 ~5 Q. Q( ~: Wof scientific rigorousness is Callaway trying to demonstrate here? Is it
2 n) g4 d6 W5 J2 _4 k$ Wlogical that if Lochter is the champion, we should assume that he leads in
& e8 D+ C7 q1 j5 Z! ^every split? That would be a terrible way to teach the public how science% I- D# C# {( q7 N, d! g
works.
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Fifth is the issue I oppose the most. Callaway quotes Ross Tucker and$ X+ P9 _7 k6 t% E
implies that a drug test cannot rule out the possibility of doping. Is this% k/ T( T( r& \" B T4 X
kind of agnosticism what Nature really wants to teach its readers? By that
& A; [7 Z$ ^8 Estandard, I estimate that at least half of the peer-reviewed scientific3 [/ U: u$ v+ H- H1 q' s
papers in Nature should be retracted. How can one convince the editors and
{' E! k1 G1 p- S. M) Dreviewers that their proposed theory works for every possible case? One
" _- }: B% a2 j2 k4 a% U; vcannot. One chooses to apply the theory to typical examples and to
( [! G/ T1 ~1 J2 p6 V& x) {demonstrate that in (hopefully) all scenarios considered, the theory works6 l# Y( z) W# g0 q
to a degree, and that that should warrant publication until a counterexample
# q# K% D' z) K3 s9 m2 D, Nis found. I could imagine that Callaway has a sceptical mind, which is# M; T s( F& W! k
crucial to scientific thinking, but that would be put to better use if he6 `1 V" F2 q9 }8 b
wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly; w. |' ]. \# e; E
advanced, non-detectable drug that the Chinese have come up with in the( |' q7 m: X( J$ w! E
past 4 years (they obviously did not have it in Beijing, otherwise why not8 y" |1 O `; a. o: X, ]
use it and woo the audience at home?), based on data and rational derivation+ a, I0 ]. |( o! B6 W
. This article, however, can be interpreted as saying that all athletes are
. Q4 F- f+ P3 p* k5 _3 }. N# x0 o0 ]doping and the authorities are just not good enough to catch them. That may" N4 P9 U5 S7 Y5 t: W' m" P
be true, logically, but definitely will not make the case if there is ever a
* N/ l& Q- e: P. D R4 Qhearing by the governing body for water sports, FINA, to determine if Ye
6 i" a. k9 b" k$ R$ j- }has doped. To ask whether it is possible to obtain a false negative in a+ G0 w* u$ W( d3 Z7 s4 f6 z- G1 R. d
drug test looks like a rigged question to me. Of course it is possible:
& `6 u& o. l4 L7 j' rother than the athlete taking a drug that the test is not designed to detect, [% ?8 g) N# u. J5 D6 k0 q0 l
, anyone who has taken quantum 101 will tell you that everything is6 Y9 ^! [; q0 q7 E, z1 G
probabilistic in nature, and so there is a probability that the drug in an
2 M, e* z( x( `4 ?& ]' y; ]athlete’s system could tunnel out right at the moment of the test. A slight
+ k: K# _1 y% l/ Wchance it may be, but should we disregard all test results because of it?: X0 l' s" E& Q% e d) y% q
Let’s be practical and reasonable, and accept that the World Anti-Doping+ l0 R) K* G, A8 n3 f/ ^
agency (WADA) is competent at its job. Ye’s urine sample will be stored for: C7 I! I2 d; M: ~/ J# H3 w
eight years after the contest for future testing as technology advances.
# X9 }2 z4 r% `; eInnocent 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-
4 q( q0 y9 } A. o$ bcompetition drug test is already in effect, which Callaway failed to mention
7 X* g2 i. y, N. As noted in the president of WADA’s press release, drug testing for
& P/ E6 X# K$ _; ]4 a6 T0 \Olympians began at least six months before the opening of the London
" } z9 p+ _& \0 zOlympics. Furthermore, 107 athletes have been banned from this Olympics for; a3 `, p( [ L
doping. That may be the reason that “everyone will pass at the Olympic
/ }! ^, S8 D; f' Pgames. Hardly anyone fails in competition testing” — those who did dope# b$ @; P9 c7 G7 k) B
have already been caught and sanctioned. Callaway is free to suggest that a
$ m. v2 F K: j8 jplayer could have doped beforehand and fooled the test at the game, but this
9 I M) I# b+ k6 D5 g0 Wpossibility is certainly ruled out for Ye.
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Over all, even though Callaway did not falsify any data, he did (
! s% ~. C$ I8 Z% Ointentionally or not) cherry-pick data that, in my view, are far too( w7 S+ m+ f7 M3 j2 ^
suggestive to be fair and unbiased. If you want to cover a story of a
& P* S: O. O4 }9 o* \( E/ ?! Lsuspected doping from a scientific point of view, be impartial and provide
; j- `7 Z: o5 b0 _/ K# H$ @' uall the facts for the reader to judge. You are entitled to your
% c) o' V& y! J+ binterpretation of the facts, and the expression thereof in your piece,
8 Y' X& U$ W% \# c* x+ k5 vexplicitly or otherwise, but showing only evidence that favours your. k" q- h; X0 M# j0 p
argument is hardly good science or journalism. Such an article in a journal
, ?! e3 u D; }such as Nature is not an appropriate example of how scientific research or
# G4 x6 w6 b" T$ a% R+ oreporting should be done. |
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