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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) Z6 L2 |4 C. T6 F0 G. h, B
如果是中国长大的,英语能到这种程度真是很不简单。' z% O. I6 r' H
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http://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html
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& e- m. _) B4 y; D* N! V9 I: LFROM LAI JIANG, Department of Chemistry, University of Pennsylvania% m0 D" f) H5 L
! e, B T4 z I6 q% SIt is a shame to see Nature — which nearly all scientists, including myself
/ t) k# M t. o2 v, regard as one of the most prestigious and influential physical-science
# E4 U" x& |( c3 y0 J' {! ?magazines — publish a thinly veiled biased article like this. Granted, this
: y& {( E9 u# U4 C5 a+ wis not a peer-reviewed scientific article and did not go through the
6 h7 i6 l0 h9 P2 f" H' sscrutiny of picking referees. But to serve as a channel for the general5 J- Y$ g v% D
populace to be in touch with and appreciate science, the authors and editors
; F( o, u* t8 Y. K2 e9 B/ qshould at least present the readers with facts within the proper context,
. Y8 q3 l5 `4 O8 R! xwhich they blatantly failed to do.7 I* E8 y/ w4 L( |
4 y$ u& |: C$ o% F9 P+ kFirst, to identify Ye’s performance increase, Ewen Callaway compared her
) N* u9 }4 [5 l4 `Olympic 400-metre IM time with her performance at the World Championships in8 E. h) A5 z9 a2 X, d
2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “
" Y" l9 i& i( v. k( Aanomalous” improvement of around 7 seconds (6.72 s). In fact, her previous `) i/ V0 E: _$ C( @$ k
personal best was 4:33.79 at the Asian Games in 2010. This leads to an
- a/ ~1 J X% U' ]6 @improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the3 ^+ C& q1 Z0 V0 Y. f# q! w
difference between the gold and silver medal, I see no reason for 5.38 s to0 ?* _+ T- I: \$ C7 K' L
be treated as 7 s.3 A9 Q' k" w2 G
1 ~. i) W+ E0 V5 ~9 g# [Second, as previously pointed out, Ye is only 16 years old and her body is
% g, ?3 u" A. ?4 ostill developing. Bettering oneself by 5 seconds over two years may seem) {3 B. \" v) }- D$ i& Q v
impossible for an adult swimmer, but it certainly happens among youngsters.
! [1 s& }+ Q1 b2 h* a' [/ \7 IAn interview with Australian gold medallist Ian Thorpe revealed that his 4004 i# g0 M* `8 ~
-metre freestyle time improved by 5 seconds between the ages of 15 and 16.( O3 H. ^* J. |- Z; {+ I
For regular people, including Callaway, it may be hard to imagine what an
6 g2 p3 o& _6 eelite swimmer can achieve as he or she matures and undergoes scientific and
& S$ K9 g' F' r. T4 @persistent training. But jumping to the conclusion that it is “anomalous”
' L R" y% ]8 H4 [; y4 W% v0 M7 Ybased on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.: k; P$ ~# J% m: K* n( Z3 ]
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Third, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook
/ q* l0 Y6 {6 `9 Rexample of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in
r: D7 @& c) @. G9 kthe last 50 metres, but Lochte had a huge lead in the first 300 metres, so6 \4 U) D/ w, d4 x
he chose not to push himself too hard and to conserve his energy for later" x, L8 k3 g+ r4 y4 L) G( T
events (whether this conforms to the Olympic spirit and the ‘use one’s0 O" h, e" g4 R9 O7 d
best efforts to win a match’ requirement that the Badminton World
) D- U8 t& @ F, L, Y6 |Federation recently invoked to disqualify four badminton pairs is another
! i J% G% t. t) h" _6 J! K5 vtopic worth discussing, though probably not in Nature). Ye, on the other: {; G% p& n! i/ w, i& d
hand, was trailing behind after the first 300 metres and relied on freestyle- _" q9 Z4 J3 P4 v! n7 e) L7 O
, in which she has an edge, to win the race. Failing to mention this5 `5 p! ~0 c" ]5 P9 t
strategic difference, as well as the fact that Lochte is 23.25 seconds
, c0 {* H4 A0 |2 h% ?" nfaster (4:05.18) than Ye overall, creates the illusion that a woman swam
+ N; q( H& M H' _! B: rfaster than the best man in the same sport, which sounds impossible. Putting
7 Z$ {' k) W! q3 e2 i0 _# qaside the gender argument, I believe this is still a leading question that* @2 I. ]. _6 A( k! }( i% l' x
implies to the reader that there is something fishy going on.+ a, s$ k( J0 V6 J* R
' Q) h2 c3 T, q) A5 }Fourth is another example of cherry-picking. In the same event, there are
" i# E1 c, e! N- X" u# O- k% xfour male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93
4 e6 O3 ^: v+ y$ k6 S9 gs) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s
9 n" X* I3 K( \: Z0 W0 w3 L) x), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns
?' l l9 y& F( c4 w0 d4 [out, if we are just talking about the last 50 metres in a 400-metre IM,
: c" W" H4 ]- _7 ~& H2 HLochter is not the example I would have used if I were the author. What kind3 i1 n/ c6 q6 l; g
of scientific rigorousness is Callaway trying to demonstrate here? Is it, x1 G. j, D4 q
logical that if Lochter is the champion, we should assume that he leads in; ^% r6 ^5 e8 q/ s: L# {: R+ t& _ ]
every split? That would be a terrible way to teach the public how science
1 a# o- Y* ]" G. _5 c3 V0 @. Jworks.
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Fifth is the issue I oppose the most. Callaway quotes Ross Tucker and
4 C* r4 {& c8 P8 V5 yimplies that a drug test cannot rule out the possibility of doping. Is this- f% M- C$ A4 ^& k0 C- l/ R
kind of agnosticism what Nature really wants to teach its readers? By that3 B% j, @7 c4 E2 L7 Q
standard, I estimate that at least half of the peer-reviewed scientific
: f# _8 N' ?$ V9 [- @2 z" @papers in Nature should be retracted. How can one convince the editors and, k0 L+ @1 Q* ?1 Z9 s: p
reviewers that their proposed theory works for every possible case? One Z+ }9 t' K7 d9 M+ J8 w
cannot. One chooses to apply the theory to typical examples and to
- U8 Y/ V, w5 d% f, b$ [demonstrate that in (hopefully) all scenarios considered, the theory works o8 P# }8 @8 z" u8 i
to a degree, and that that should warrant publication until a counterexample( @* I4 j1 F/ z: a
is found. I could imagine that Callaway has a sceptical mind, which is9 D$ I' P, J/ h: K6 Y
crucial to scientific thinking, but that would be put to better use if he% w% |7 y+ z) w$ Q& M
wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly9 {9 q4 f* k4 q& X- _
advanced, non-detectable drug that the Chinese have come up with in the. k: x, \; X! I/ O0 i
past 4 years (they obviously did not have it in Beijing, otherwise why not
4 N3 y& x7 B8 `2 d* O7 U" |( h1 Euse it and woo the audience at home?), based on data and rational derivation
' O4 U* v' p3 a. This article, however, can be interpreted as saying that all athletes are
$ a& N N! M/ y+ F, m/ p+ T. Kdoping and the authorities are just not good enough to catch them. That may" t- I8 A! K# r2 a8 j6 h/ ], _4 C
be true, logically, but definitely will not make the case if there is ever a/ f* S& F) }8 C
hearing by the governing body for water sports, FINA, to determine if Ye6 n- Q: V* g6 V- I0 A: k$ T* k
has doped. To ask whether it is possible to obtain a false negative in a/ `: c) t5 {8 C. [ P4 \
drug test looks like a rigged question to me. Of course it is possible:2 h2 V T, X2 _
other than the athlete taking a drug that the test is not designed to detect, X3 F) h) _0 q) V1 ^6 l1 E
, anyone who has taken quantum 101 will tell you that everything is
7 g3 Y. e8 w( a7 |probabilistic in nature, and so there is a probability that the drug in an
# ?/ ?9 q+ d: l$ O. l2 N) |athlete’s system could tunnel out right at the moment of the test. A slight
" J, E0 f% g& D& S2 ~chance it may be, but should we disregard all test results because of it?
. |' P6 A+ ]( R0 b: }+ ALet’s be practical and reasonable, and accept that the World Anti-Doping0 p, O6 N% G4 g
agency (WADA) is competent at its job. Ye’s urine sample will be stored for
0 @5 F& N( S' O; o7 deight years after the contest for future testing as technology advances.; K- p$ E% u. `# e h
Innocent 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-$ A9 s* ?; w" P: S7 k# n
competition drug test is already in effect, which Callaway failed to mention
5 ~6 T0 Y2 V ~! @. As noted in the president of WADA’s press release, drug testing for3 @% A/ b/ O9 r$ i# X' D, i2 M
Olympians began at least six months before the opening of the London n( U# n* W- d4 r7 a: b
Olympics. Furthermore, 107 athletes have been banned from this Olympics for M5 g0 {, c7 c: c3 Y- y
doping. That may be the reason that “everyone will pass at the Olympic) w4 \% W c( n
games. Hardly anyone fails in competition testing” — those who did dope/ M4 A1 `& ?4 Q4 R# k, p* h& i
have already been caught and sanctioned. Callaway is free to suggest that a3 y* A% m, V+ E1 G
player could have doped beforehand and fooled the test at the game, but this
4 v/ J0 I& P+ i3 H9 `% L) Hpossibility is certainly ruled out for Ye.
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x% b5 X# z: @6 u% z# U/ iOver all, even though Callaway did not falsify any data, he did (
, E$ {3 R/ Q9 F$ `5 ^- T5 Pintentionally or not) cherry-pick data that, in my view, are far too
8 Z% N) G* I& e2 s) _% p$ J$ Y/ K9 o0 bsuggestive to be fair and unbiased. If you want to cover a story of a4 S; ?& Z) n# W. @4 ^: T1 G
suspected doping from a scientific point of view, be impartial and provide/ y/ q( n i: m1 f' D/ ]
all the facts for the reader to judge. You are entitled to your: P1 _! B3 z: R) d
interpretation of the facts, and the expression thereof in your piece," c5 |. M7 m% X3 o3 W! d9 c
explicitly or otherwise, but showing only evidence that favours your
- T* [% q0 M! @7 J1 s+ n' _+ Bargument is hardly good science or journalism. Such an article in a journal
0 l b$ ] y d+ b' m" D' dsuch as Nature is not an appropriate example of how scientific research or
; W$ i- r6 O6 c2 wreporting should be done. |
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