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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
% T0 f) q3 m( F* p. V( k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 myself3 F5 M7 z- m7 g* B# V) j
, regard as one of the most prestigious and influential physical-science
7 x+ M! s: ]; F6 kmagazines — publish a thinly veiled biased article like this. Granted, this
+ q& Z5 c3 V, ]; @4 xis not a peer-reviewed scientific article and did not go through the
( N& t! f7 ^$ t; [6 ~scrutiny of picking referees. But to serve as a channel for the general, D* i' ]% }8 r8 M
populace to be in touch with and appreciate science, the authors and editors" E1 `! w! ~$ E, w# e
should at least present the readers with facts within the proper context,
# W- G" `. [* _' g1 `* G; bwhich they blatantly failed to do.
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; ~; Y. ^& b# V) H* b' z0 I# E7 b' g) hFirst, to identify Ye’s performance increase, Ewen Callaway compared her6 u( T, y9 D9 W2 a+ R
Olympic 400-metre IM time with her performance at the World Championships in4 a1 N8 p" _* z1 F( ]
2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “1 N6 x7 _, N. m
anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous
: @' x$ V9 i. U# h# [+ qpersonal best was 4:33.79 at the Asian Games in 2010. This leads to an
: a; h( \+ T5 S+ e! C1 G) \improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the
% _) |% T2 ?+ ?& K" Wdifference between the gold and silver medal, I see no reason for 5.38 s to5 s; q* V6 `) W: F; y9 v
be treated as 7 s.2 L- @, l! k$ ~) T1 o: u
2 C6 Y0 ~2 s; g% [' jSecond, as previously pointed out, Ye is only 16 years old and her body is8 O+ L, p1 G; e3 k0 D
still developing. Bettering oneself by 5 seconds over two years may seem, K) Z! J* d3 j4 m. U7 ]+ G5 Y5 _
impossible for an adult swimmer, but it certainly happens among youngsters.( o+ ~" D: w& y# z \
An interview with Australian gold medallist Ian Thorpe revealed that his 400
6 A9 M! G: B h5 y% z6 W: O! q-metre freestyle time improved by 5 seconds between the ages of 15 and 16.4 i, f, G) A4 n x; U- M
For regular people, including Callaway, it may be hard to imagine what an
$ T- @( O- B$ t2 [elite swimmer can achieve as he or she matures and undergoes scientific and v0 N- r e: l9 k- v
persistent training. But jumping to the conclusion that it is “anomalous”
; b9 [* j% A7 mbased on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.
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H" K! ~4 t6 ?0 F) L: yThird, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook' z' ^3 c0 v4 B$ g1 @
example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in2 g L" X$ h! p9 N1 w
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so
& }, I7 z- Q3 D+ l& O% Ohe chose not to push himself too hard and to conserve his energy for later% z) \6 f" k: L# c4 M: Z
events (whether this conforms to the Olympic spirit and the ‘use one’s' p2 S3 T' j$ e/ o5 J0 j
best efforts to win a match’ requirement that the Badminton World
1 N6 W" m+ x7 }% EFederation recently invoked to disqualify four badminton pairs is another
" J7 G" P/ \2 m8 K5 z/ [( q$ mtopic worth discussing, though probably not in Nature). Ye, on the other
5 j; V0 o! |9 \5 jhand, was trailing behind after the first 300 metres and relied on freestyle* s# o% W+ _4 l3 H& q: z: a
, in which she has an edge, to win the race. Failing to mention this1 F) r/ q. X+ F* B3 x
strategic difference, as well as the fact that Lochte is 23.25 seconds
% j" F" c7 {. R' Ofaster (4:05.18) than Ye overall, creates the illusion that a woman swam# X* X1 T( q Y$ _0 ^ ]0 D+ ?
faster than the best man in the same sport, which sounds impossible. Putting0 `4 E/ }* Y$ U1 L
aside the gender argument, I believe this is still a leading question that
8 N2 f0 P/ N6 E% x: Limplies to the reader that there is something fishy going on.
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% P) A( V. |1 B% F# e8 Y% h1 \Fourth is another example of cherry-picking. In the same event, there are
7 T' ]' w0 x/ ~, tfour male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.931 N, n. {2 h- F: y. B: s4 z( l
s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s0 }9 |# b! x& ?+ i) m
), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns
9 {1 x+ m* R3 U8 z+ C: ?4 eout, if we are just talking about the last 50 metres in a 400-metre IM,
& v( g1 k( w& M( ?: C' s- c4 Q {Lochter is not the example I would have used if I were the author. What kind, C" O# T+ O6 r* r
of scientific rigorousness is Callaway trying to demonstrate here? Is it; ?7 H2 G6 F' \# S* P' o
logical that if Lochter is the champion, we should assume that he leads in) }3 A0 v0 l2 a, Z- M
every split? That would be a terrible way to teach the public how science8 E9 z3 A, b* o- k! z2 b- t
works.
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( P4 B3 d4 ~& V9 a7 OFifth is the issue I oppose the most. Callaway quotes Ross Tucker and9 k& J5 V m3 [. v/ V9 N: Y( Y* I
implies that a drug test cannot rule out the possibility of doping. Is this
6 W2 W8 j) e+ e$ U- a4 \" ikind of agnosticism what Nature really wants to teach its readers? By that
0 y, J" y& R$ Cstandard, I estimate that at least half of the peer-reviewed scientific
1 s: }7 O% c) Wpapers in Nature should be retracted. How can one convince the editors and' o8 d0 @- _5 r. e1 w. v
reviewers that their proposed theory works for every possible case? One+ C( b& ]$ z a$ l- @( V V& i' U2 h* `
cannot. One chooses to apply the theory to typical examples and to) w: }* _9 V, d" H0 q3 Z# Q
demonstrate that in (hopefully) all scenarios considered, the theory works
4 I6 W. }; P' u' Q& p0 Nto a degree, and that that should warrant publication until a counterexample
( B' ?( H* i5 }3 v( y+ }is found. I could imagine that Callaway has a sceptical mind, which is7 V3 Y9 s" c0 @0 M ]
crucial to scientific thinking, but that would be put to better use if he3 I, l- W% o6 c% R; p
wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly
! S! `+ G' |. |! kadvanced, non-detectable drug that the Chinese have come up with in the
* S0 v; G1 L& qpast 4 years (they obviously did not have it in Beijing, otherwise why not
/ G- \9 g$ [( {. Y* ]; Vuse it and woo the audience at home?), based on data and rational derivation1 U# X: W' M) W5 [0 b( o
. This article, however, can be interpreted as saying that all athletes are
" ~/ O# `5 K8 ldoping and the authorities are just not good enough to catch them. That may$ t" s' S% U! o9 ^( k+ B
be true, logically, but definitely will not make the case if there is ever a
" L6 b, n0 ]7 E: `. ihearing by the governing body for water sports, FINA, to determine if Ye. E" K. R' R6 S, J& d+ l
has doped. To ask whether it is possible to obtain a false negative in a
, B0 ]' |6 H3 B9 }9 P9 q: sdrug test looks like a rigged question to me. Of course it is possible:
7 s, ^+ {% H/ M" }5 T K$ ^$ aother than the athlete taking a drug that the test is not designed to detect
4 p, @- J4 @, g' Y, anyone who has taken quantum 101 will tell you that everything is1 ^, o/ S% e* q
probabilistic in nature, and so there is a probability that the drug in an
" X* l9 O0 ~/ r* M, K/ tathlete’s system could tunnel out right at the moment of the test. A slight# W4 b, ?/ e" V
chance it may be, but should we disregard all test results because of it?
& B5 i* N& ^- S7 Q( U4 Y! X; L- \Let’s be practical and reasonable, and accept that the World Anti-Doping
: d* {- B: f) _2 y: Jagency (WADA) is competent at its job. Ye’s urine sample will be stored for5 E# }& @: b2 v* N) K
eight years after the contest for future testing as technology advances.
% J5 y/ j3 i5 g, x, ?7 Q( }Innocent until proven guilty, shouldn’t it be?- r2 p/ e1 O2 E. I) n# }
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Sixth, and the last point I would like to make, is that the out-of-
! p9 {6 ~. J, d) Q3 icompetition drug test is already in effect, which Callaway failed to mention
% X. ^: u" a2 b2 `* v- ]. As noted in the president of WADA’s press release, drug testing for
6 G2 {: p4 z7 B. `' V/ }! [( mOlympians began at least six months before the opening of the London9 K8 H' Q% M( w4 C4 D9 Y, N) d
Olympics. Furthermore, 107 athletes have been banned from this Olympics for
9 k* l( h: P# J2 Q h; odoping. That may be the reason that “everyone will pass at the Olympic
! j- ?! e3 H. Y2 q6 {, bgames. Hardly anyone fails in competition testing” — those who did dope y/ E0 n+ V9 F$ _) L5 I
have already been caught and sanctioned. Callaway is free to suggest that a
* G) B3 M5 _! Oplayer could have doped beforehand and fooled the test at the game, but this
' z% O& r# R$ V" d, \) L8 V, j. Spossibility is certainly ruled out for Ye.
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Over all, even though Callaway did not falsify any data, he did (
0 G. T' t7 v5 ~. V& Z$ hintentionally or not) cherry-pick data that, in my view, are far too
2 t8 ~- k* y7 u+ ]: ^suggestive to be fair and unbiased. If you want to cover a story of a6 O) Z$ T# ~' n" s, C" m
suspected doping from a scientific point of view, be impartial and provide0 N6 ]/ c5 E7 Q! q8 [. _+ E
all the facts for the reader to judge. You are entitled to your
4 L( p" p6 j: g+ }9 _7 y3 G- B4 Jinterpretation of the facts, and the expression thereof in your piece,
: [6 W, Y( K- n* P. R* C4 Xexplicitly or otherwise, but showing only evidence that favours your
' g9 R- \& J. fargument is hardly good science or journalism. Such an article in a journal( Y, l. H* c P" v* C: s; ]) s
such as Nature is not an appropriate example of how scientific research or
+ {" i, V( g. o1 N& Greporting should be done. |
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