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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
5 n, C @0 j6 ?如果是中国长大的,英语能到这种程度真是很不简单。7 I5 j" l% S; H" n/ R7 `5 |! c1 v
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http://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html5 Z" D8 Z6 S4 M# \
3 v: D/ s' y0 b8 G h3 i- |FROM LAI JIANG, Department of Chemistry, University of Pennsylvania1 X: G8 Q2 c2 k. j" c
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It is a shame to see Nature — which nearly all scientists, including myself
) L0 B$ S7 l" m; e, regard as one of the most prestigious and influential physical-science
, ~: k* k( G( \magazines — publish a thinly veiled biased article like this. Granted, this
' C' x3 g+ K, ]! [; lis not a peer-reviewed scientific article and did not go through the$ H7 z# L8 g, y: t; B
scrutiny of picking referees. But to serve as a channel for the general) k0 s5 Z: ]+ }; G
populace to be in touch with and appreciate science, the authors and editors
8 {+ X0 F h) l% x) ` ]- g4 S" Sshould at least present the readers with facts within the proper context,
8 D, I$ r! G% e4 K$ c2 xwhich they blatantly failed to do.1 H F# j! j- s: V9 V3 _* _
- ^' Q, C7 H5 LFirst, to identify Ye’s performance increase, Ewen Callaway compared her3 ~; N1 P8 M* ?" V5 M
Olympic 400-metre IM time with her performance at the World Championships in
R" ]3 \4 R% Q7 s% i$ q& l2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “
. S, b, F U Q; u1 L* Lanomalous” improvement of around 7 seconds (6.72 s). In fact, her previous: x8 U$ j! n4 Q- m
personal best was 4:33.79 at the Asian Games in 2010. This leads to an
# S; D$ J7 ^# w/ U' B0 `improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the6 S( J3 t/ {$ H2 r% Z$ \* u$ d2 w
difference between the gold and silver medal, I see no reason for 5.38 s to
# `3 ?: ]0 n7 y; d7 Bbe treated as 7 s.
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Second, as previously pointed out, Ye is only 16 years old and her body is
1 G3 e! i- R8 \- K. H. [still developing. Bettering oneself by 5 seconds over two years may seem
5 L) a$ M R5 p6 O' r) limpossible for an adult swimmer, but it certainly happens among youngsters.
. N0 [$ X& L F+ x+ H; O6 CAn interview with Australian gold medallist Ian Thorpe revealed that his 400/ r+ ~, ?" u$ D" M& \) S: V$ S
-metre freestyle time improved by 5 seconds between the ages of 15 and 16.8 x2 T; W9 H# U6 D! F' E3 s
For regular people, including Callaway, it may be hard to imagine what an! ?0 i1 j% c6 H, |
elite swimmer can achieve as he or she matures and undergoes scientific and: r9 E7 W( W- b/ k5 p# { |$ i- P
persistent training. But jumping to the conclusion that it is “anomalous”
* f7 a- T1 M4 G7 E& h1 o* rbased on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.
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1 ?1 P" t1 }; ^; \# jThird, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook
8 ?' ]# d+ n6 M* g) i) _: d7 d' y: [example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in' E9 T% @$ _& _6 l! n$ U
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so
' p% P4 f* |( E4 S8 [he chose not to push himself too hard and to conserve his energy for later; n7 _, s( {/ e6 Z) }3 n
events (whether this conforms to the Olympic spirit and the ‘use one’s
& p' T# c' q$ Q! sbest efforts to win a match’ requirement that the Badminton World
: e' z6 h" s, @. i' SFederation recently invoked to disqualify four badminton pairs is another) o2 O4 o: v! `8 j
topic worth discussing, though probably not in Nature). Ye, on the other+ v+ D% g0 \9 C F- R
hand, was trailing behind after the first 300 metres and relied on freestyle
c# o3 w# Z# `: n0 h, in which she has an edge, to win the race. Failing to mention this T9 `0 V# j2 y; y
strategic difference, as well as the fact that Lochte is 23.25 seconds( M) j+ j8 m* y) J
faster (4:05.18) than Ye overall, creates the illusion that a woman swam1 b, G1 x& F. Q2 y, @5 S
faster than the best man in the same sport, which sounds impossible. Putting* s% R1 h; D# r j; v: y
aside the gender argument, I believe this is still a leading question that
: v& Z3 | T8 d. A3 R S I6 m. nimplies to the reader that there is something fishy going on.
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9 t3 J/ E% i& S& TFourth is another example of cherry-picking. In the same event, there are
; w6 z2 W" a8 q8 ]four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93. b+ g! X8 k+ P. E& o [0 k1 q
s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s) }6 g1 o* G$ s! h
), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns4 _$ C. u. g2 F ?
out, if we are just talking about the last 50 metres in a 400-metre IM,2 Q+ |* ^/ S! {9 O0 A/ d, M- E* @* {
Lochter is not the example I would have used if I were the author. What kind
" q2 s8 v- J! s2 F& j% J/ ^of scientific rigorousness is Callaway trying to demonstrate here? Is it
- V6 B( O$ b- L8 f0 m% p- }logical that if Lochter is the champion, we should assume that he leads in
0 }/ Z, Z! ~& M- c s: oevery split? That would be a terrible way to teach the public how science" a1 }2 }: J* p+ ^7 o5 F
works.
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Fifth is the issue I oppose the most. Callaway quotes Ross Tucker and' o) I$ f6 K! X) l
implies that a drug test cannot rule out the possibility of doping. Is this/ G3 \; g: T0 W2 x1 m
kind of agnosticism what Nature really wants to teach its readers? By that
+ b0 x' t9 p% estandard, I estimate that at least half of the peer-reviewed scientific; C: w4 x" [* k% t
papers in Nature should be retracted. How can one convince the editors and h/ k5 t6 h9 U# }$ d
reviewers that their proposed theory works for every possible case? One; a! k+ ~0 i f% @, [# n% l
cannot. One chooses to apply the theory to typical examples and to
7 e- e# M7 Y) C% g% z% ]: @% qdemonstrate that in (hopefully) all scenarios considered, the theory works
2 k9 m( y; q( i/ U* J6 G6 ato a degree, and that that should warrant publication until a counterexample
+ B& C" q8 M6 C. q- Sis found. I could imagine that Callaway has a sceptical mind, which is9 Q' \2 N' m7 x( k" h) `
crucial to scientific thinking, but that would be put to better use if he
, z" S; E% [. O7 B/ D1 iwrote a peer-reviewed paper that discussed the odds of Ye doping on a highly
( {' `# V. C0 a3 N9 qadvanced, non-detectable drug that the Chinese have come up with in the
& e2 h% u8 c }/ b9 t4 |past 4 years (they obviously did not have it in Beijing, otherwise why not
7 A8 q5 y6 {- h+ i4 K5 }use it and woo the audience at home?), based on data and rational derivation
1 I/ f/ e" K9 ^' I. This article, however, can be interpreted as saying that all athletes are# _ ^6 c9 r, \* Q! ^1 f
doping and the authorities are just not good enough to catch them. That may7 j- N3 W7 i. r+ l' ]) t
be true, logically, but definitely will not make the case if there is ever a3 _1 M" C F' P; _
hearing by the governing body for water sports, FINA, to determine if Ye. @- ^# i# L3 \- ]/ |; p0 F
has doped. To ask whether it is possible to obtain a false negative in a
`$ Q2 w9 p& a$ ]% s2 ~drug test looks like a rigged question to me. Of course it is possible:
! e, S; O, v1 h6 S( A/ lother than the athlete taking a drug that the test is not designed to detect
5 D+ s& [# I/ W2 h, anyone who has taken quantum 101 will tell you that everything is$ T3 w7 W1 [7 Y
probabilistic in nature, and so there is a probability that the drug in an
- E4 g% o( R) ^& s8 z Zathlete’s system could tunnel out right at the moment of the test. A slight
5 r& y" x2 T$ K5 n- i5 ^) G& ?chance it may be, but should we disregard all test results because of it?
3 F% K/ b; ^0 JLet’s be practical and reasonable, and accept that the World Anti-Doping
0 M- h; r4 u- D- P1 u' ]agency (WADA) is competent at its job. Ye’s urine sample will be stored for
6 V/ W! k# e, b5 t6 E* `/ [6 Geight years after the contest for future testing as technology advances.
2 Q$ T" _6 G2 x/ KInnocent until proven guilty, shouldn’t it be?# [# o* E# p" Y
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Sixth, and the last point I would like to make, is that the out-of-
- d* R9 d- i6 ^! n! hcompetition drug test is already in effect, which Callaway failed to mention
+ L$ o. M/ e) o! u) x8 s" ?1 e. As noted in the president of WADA’s press release, drug testing for2 k6 k1 ^, K; C* z3 ?
Olympians began at least six months before the opening of the London
9 {' I) X* w' }% n, s. sOlympics. Furthermore, 107 athletes have been banned from this Olympics for& d' d: \0 q* P4 ~$ Q$ f2 \( U! ~+ D/ ]
doping. That may be the reason that “everyone will pass at the Olympic
: F- _; ]) d. mgames. Hardly anyone fails in competition testing” — those who did dope$ R! N2 v" a" \
have already been caught and sanctioned. Callaway is free to suggest that a
. s6 i* Y3 K8 J; S0 v$ A2 B3 n* Cplayer could have doped beforehand and fooled the test at the game, but this
$ e0 y8 x/ A$ e+ J6 O" ]; D( _possibility is certainly ruled out for Ye.4 Y9 T. S4 [! r+ ^5 H1 E) e
& U4 w$ \% s. x0 W( i' GOver all, even though Callaway did not falsify any data, he did (: G! X; c! m% F# s* q. D
intentionally or not) cherry-pick data that, in my view, are far too
- V7 Z. h' a$ Q& D5 ], @* |suggestive to be fair and unbiased. If you want to cover a story of a& ~- A0 B5 ?# ^# u! L: E7 ?/ {
suspected doping from a scientific point of view, be impartial and provide
4 c, @) v9 F$ ?+ b: xall the facts for the reader to judge. You are entitled to your+ K7 J$ H D2 o/ [$ N
interpretation of the facts, and the expression thereof in your piece,
0 R% }8 h9 o/ x& U. u1 ]! O! [6 t) ^explicitly or otherwise, but showing only evidence that favours your
7 ^ w. z+ |0 I( t# t, `& A# kargument is hardly good science or journalism. Such an article in a journal
`( K/ P$ s) b6 b/ w3 dsuch as Nature is not an appropriate example of how scientific research or
$ |4 ]1 X8 s/ L' Preporting should be done. |
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