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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 JIANG1 J0 ]! p* p: @! s; {% n
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
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It is a shame to see Nature — which nearly all scientists, including myself; T; m1 ]: [& w' U! }
, regard as one of the most prestigious and influential physical-science) d! [: J; m! X; q/ F
magazines — publish a thinly veiled biased article like this. Granted, this
, M& ~4 N* t2 j' }+ |/ eis not a peer-reviewed scientific article and did not go through the
% n5 R `! L, o% gscrutiny of picking referees. But to serve as a channel for the general
2 y( ^ V6 ^9 C' T( e9 Xpopulace to be in touch with and appreciate science, the authors and editors1 R) Y: Z' d2 k2 e, g# h3 }
should at least present the readers with facts within the proper context,
5 x/ S7 h. B+ w6 vwhich they blatantly failed to do.$ w9 u% F! k1 |: c2 L; \
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First, to identify Ye’s performance increase, Ewen Callaway compared her
- O( O2 C' r# d# \, f' nOlympic 400-metre IM time with her performance at the World Championships in
, K& c+ v. b5 J1 i& D; f2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “/ ]+ O, C4 O5 E$ ?: R u
anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous4 @2 Q+ U; F7 c. x. V
personal best was 4:33.79 at the Asian Games in 2010. This leads to an
* l4 O% R* d s( vimprovement of 5.38 seconds. In a sporting event in which 0.1 s can be the# g0 G: ^* u+ w) A
difference between the gold and silver medal, I see no reason for 5.38 s to$ G/ z' j+ \& Y* f
be treated as 7 s.
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# c8 o. W6 M* w* [$ t& U7 TSecond, as previously pointed out, Ye is only 16 years old and her body is+ z; R3 R, Q2 C) a4 d' K( S
still developing. Bettering oneself by 5 seconds over two years may seem
, H# u( g- k! o8 U3 ?" cimpossible for an adult swimmer, but it certainly happens among youngsters.
8 ]: k% ?7 ?+ s+ s" jAn interview with Australian gold medallist Ian Thorpe revealed that his 4000 z$ ?- c C+ D; ?! n
-metre freestyle time improved by 5 seconds between the ages of 15 and 16.
8 g2 f; H* o- y4 AFor regular people, including Callaway, it may be hard to imagine what an
! K7 J9 q9 m# b* Y# Lelite swimmer can achieve as he or she matures and undergoes scientific and
5 R: g+ J9 \4 @/ S0 m. Epersistent training. But jumping to the conclusion that it is “anomalous”. P; i( B; w1 \- _+ y
based on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound." u* m; W( ?! n% {( W* f6 U1 Z; Y, V( g
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Third, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook
- p2 B5 R& T4 z9 n0 |: Y( g) @example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in
; I+ U6 E9 S" i( m1 Hthe last 50 metres, but Lochte had a huge lead in the first 300 metres, so
- T, l; X9 G. B- C; n/ dhe chose not to push himself too hard and to conserve his energy for later
5 G1 Z" U3 e) _% c' n- }events (whether this conforms to the Olympic spirit and the ‘use one’s
* K0 A5 p- R* F! o, qbest efforts to win a match’ requirement that the Badminton World( y, P5 O1 @' B' C. n9 [
Federation recently invoked to disqualify four badminton pairs is another' e9 J! d U% ~" `) X
topic worth discussing, though probably not in Nature). Ye, on the other \- O% E( n( A0 h
hand, was trailing behind after the first 300 metres and relied on freestyle
! }& X6 ?( M7 ]' t% p- ~" a" G0 B, in which she has an edge, to win the race. Failing to mention this
, O6 @* m/ e( U2 fstrategic difference, as well as the fact that Lochte is 23.25 seconds2 V: K3 U9 s* ?& I4 a. \
faster (4:05.18) than Ye overall, creates the illusion that a woman swam5 z0 S4 J/ Z# j0 F+ ?! a" n
faster than the best man in the same sport, which sounds impossible. Putting
- X4 ?9 |' b! G: B: z. oaside the gender argument, I believe this is still a leading question that
/ T- {% ~3 {2 R# pimplies to the reader that there is something fishy going on./ `5 ^; M) q* R
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Fourth is another example of cherry-picking. In the same event, there are
8 u% j) z/ B$ r1 E5 z Q% m7 Pfour male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93
R- ?7 O7 x: [4 T: I1 as) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s
* s: { L, d* B3 P: J6 m0 I- |$ u X), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns
. i# q# J7 D1 E6 ~out, if we are just talking about the last 50 metres in a 400-metre IM,
( K8 K1 T- x0 h$ I* o7 G. OLochter is not the example I would have used if I were the author. What kind( B S% e+ W( k/ b. E
of scientific rigorousness is Callaway trying to demonstrate here? Is it
+ A& L& c4 N0 S- ], ?/ F* p6 z! ilogical that if Lochter is the champion, we should assume that he leads in
( b O/ e0 `" o3 x& S1 {every split? That would be a terrible way to teach the public how science- v) C$ \9 a$ N" y! ~: b4 O" {
works.6 P3 h: V5 m/ r/ t9 L1 i
- _: n4 V# O6 i7 }. v+ HFifth is the issue I oppose the most. Callaway quotes Ross Tucker and6 u$ W- h: M) j+ _0 b8 E: W) M
implies that a drug test cannot rule out the possibility of doping. Is this* h- R) q% i @+ P5 ~$ x% w4 }' h* o
kind of agnosticism what Nature really wants to teach its readers? By that
" x4 x0 C6 W# V" ustandard, I estimate that at least half of the peer-reviewed scientific
, V. @: k1 {9 B0 C8 o& F r4 c, Upapers in Nature should be retracted. How can one convince the editors and
0 r/ P! s3 p5 t2 u" l: @reviewers that their proposed theory works for every possible case? One
; ~2 F. B( S& l/ o- z/ ^) {& }8 Xcannot. One chooses to apply the theory to typical examples and to
( Z: b. E5 w/ ] r5 C8 fdemonstrate that in (hopefully) all scenarios considered, the theory works
' W5 j2 |! A" hto a degree, and that that should warrant publication until a counterexample9 ~! U3 ~! D( O, R
is found. I could imagine that Callaway has a sceptical mind, which is; ~$ W* j8 U" F$ S4 g
crucial to scientific thinking, but that would be put to better use if he* K' [+ P4 h5 }4 Y1 s
wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly
! |1 B: `# x- a, b6 N: a9 ?advanced, non-detectable drug that the Chinese have come up with in the0 i: m) d9 q4 O' |9 L4 ^2 O/ h5 _: n0 b
past 4 years (they obviously did not have it in Beijing, otherwise why not! J5 w2 H! C% P: p) R% p: B
use it and woo the audience at home?), based on data and rational derivation8 }( N) O- o( a: J
. This article, however, can be interpreted as saying that all athletes are
4 p- d; e' O4 g1 U2 p- Qdoping and the authorities are just not good enough to catch them. That may
& R) r- w8 V# Q; u5 Y9 _be true, logically, but definitely will not make the case if there is ever a! ~ f+ V+ ?' n! W, f1 q7 T$ L7 \, S
hearing by the governing body for water sports, FINA, to determine if Ye, Z3 k8 \1 {! J* N; \
has doped. To ask whether it is possible to obtain a false negative in a
8 U) `# h, r4 Y" `' ?drug test looks like a rigged question to me. Of course it is possible:
. e. M) y7 o/ x, cother than the athlete taking a drug that the test is not designed to detect
4 j# o* f. w% g" v8 R" s, Z; [, anyone who has taken quantum 101 will tell you that everything is3 p5 I0 w2 P" @: D; f2 ~1 m
probabilistic in nature, and so there is a probability that the drug in an
0 S( f K2 A9 v! j4 x+ T6 b8 H4 sathlete’s system could tunnel out right at the moment of the test. A slight ~/ [ b" u: q
chance it may be, but should we disregard all test results because of it?
6 l8 B' [3 I/ Y% W- tLet’s be practical and reasonable, and accept that the World Anti-Doping
' t; I/ [$ u% B4 D0 E5 yagency (WADA) is competent at its job. Ye’s urine sample will be stored for, e* h7 n' T! U7 F" A. i
eight years after the contest for future testing as technology advances.
! t( d4 M$ ~' F# F; i) j% PInnocent until proven guilty, shouldn’t it be?
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3 x2 t M! c! ^: e. g. E& vSixth, and the last point I would like to make, is that the out-of-1 ~/ N' b6 v/ ^+ j0 [2 W
competition drug test is already in effect, which Callaway failed to mention7 s. h1 F) C6 N3 j. k& i) N
. As noted in the president of WADA’s press release, drug testing for. ]$ u, d0 F- a# R- I" l1 B6 D
Olympians began at least six months before the opening of the London
; Q0 S1 c6 }. ? EOlympics. Furthermore, 107 athletes have been banned from this Olympics for6 c' y3 @! v+ k, F& T6 V$ }6 Z( S
doping. That may be the reason that “everyone will pass at the Olympic' S/ C$ X, F( q% r3 P
games. Hardly anyone fails in competition testing” — those who did dope
; S; `% L- u' u+ y; v& [% qhave already been caught and sanctioned. Callaway is free to suggest that a4 C, s9 A" Y, Z* p/ _
player could have doped beforehand and fooled the test at the game, but this
q6 {* o) F! T6 Wpossibility is certainly ruled out for Ye.+ Y5 Z0 j. M# q ^
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Over all, even though Callaway did not falsify any data, he did (
9 h7 @$ p2 M( h& d' x! z8 B* wintentionally or not) cherry-pick data that, in my view, are far too" F* i9 o1 V/ g6 f9 _7 ^) q* G
suggestive to be fair and unbiased. If you want to cover a story of a9 u/ k$ _% z) C5 F! G% _ t- q
suspected doping from a scientific point of view, be impartial and provide
7 P2 H4 M( T: J) `2 P f) aall the facts for the reader to judge. You are entitled to your! D* ~: L/ s3 W& {2 z
interpretation of the facts, and the expression thereof in your piece,
! u+ y- |' F0 o1 iexplicitly or otherwise, but showing only evidence that favours your
8 B0 j- l0 Y) V$ ?6 x$ M( margument is hardly good science or journalism. Such an article in a journal
3 k* Q1 r" P3 V) R4 @such as Nature is not an appropriate example of how scientific research or
% s$ f& A. R* lreporting should be done. |
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