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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 J$ k5 W; b& C% D9 ], H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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: v8 O- J$ ^/ v, Nhttp://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html p4 G( j. e1 T: M: |9 k
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FROM LAI JIANG, Department of Chemistry, University of Pennsylvania
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# c6 a4 t: i q" T) BIt is a shame to see Nature — which nearly all scientists, including myself. ?: ]4 q! n; |; a s% I( L% Q
, regard as one of the most prestigious and influential physical-science$ f" J5 M% P. B1 d) p6 P
magazines — publish a thinly veiled biased article like this. Granted, this; o7 M2 w* i5 _# W+ e1 n
is not a peer-reviewed scientific article and did not go through the
$ E* j9 M5 X1 {. s- c; W xscrutiny of picking referees. But to serve as a channel for the general
8 [7 t( u4 ]7 J# wpopulace to be in touch with and appreciate science, the authors and editors8 S: K0 a6 s' C8 g V5 b* j
should at least present the readers with facts within the proper context,2 h' q2 Z6 z4 f; m- d
which they blatantly failed to do.
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n" W) c2 V0 M0 kFirst, to identify Ye’s performance increase, Ewen Callaway compared her
+ q5 f( c, y0 S1 K, l" XOlympic 400-metre IM time with her performance at the World Championships in
$ N( N% _3 |# ?0 x- Y2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “
" D8 H, |' ]$ O: A& p U% s; u; ?anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous5 e0 B$ @" @' _% I& Z
personal best was 4:33.79 at the Asian Games in 2010. This leads to an
: g3 _ H1 ~4 K/ aimprovement of 5.38 seconds. In a sporting event in which 0.1 s can be the9 C% Y& d0 p0 U9 w: y
difference between the gold and silver medal, I see no reason for 5.38 s to
( I+ ?9 I4 Q( w- Z; w' i& obe treated as 7 s.
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Second, as previously pointed out, Ye is only 16 years old and her body is
) N, Q( P- { |3 [2 tstill developing. Bettering oneself by 5 seconds over two years may seem
) p1 }7 D5 ?9 ~4 z* Cimpossible for an adult swimmer, but it certainly happens among youngsters.; Z" p2 y, V' B6 m
An interview with Australian gold medallist Ian Thorpe revealed that his 400
$ x2 [ D5 A- t+ p9 g `-metre freestyle time improved by 5 seconds between the ages of 15 and 16.
( Y( q' _; x$ C3 uFor regular people, including Callaway, it may be hard to imagine what an; {6 ?$ j/ i- b1 L( J% b: e
elite swimmer can achieve as he or she matures and undergoes scientific and
+ B. B6 ]5 Q4 V ypersistent training. But jumping to the conclusion that it is “anomalous”
& F9 E J& g$ Sbased on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.
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* ~; _% J5 R. R! B+ H9 IThird, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook2 g2 L6 v" r: [, A: i# Z% e
example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in9 g! n! e) `9 O: B
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so. b2 i0 X* p- w# Y& h# x( M0 w
he chose not to push himself too hard and to conserve his energy for later
" M- Y$ D! I% H- L4 h$ nevents (whether this conforms to the Olympic spirit and the ‘use one’s1 j/ s" c. e6 N3 D8 ^; y/ d
best efforts to win a match’ requirement that the Badminton World* ?& \, c( r: c8 A9 C! }5 B, N
Federation recently invoked to disqualify four badminton pairs is another
% s& Z! ~" ?4 E9 D- Q. ctopic worth discussing, though probably not in Nature). Ye, on the other# H+ j R; i- {6 g l+ W
hand, was trailing behind after the first 300 metres and relied on freestyle! k, B3 z7 a+ F% Y! ]
, in which she has an edge, to win the race. Failing to mention this
# a: m1 }6 P3 }( bstrategic difference, as well as the fact that Lochte is 23.25 seconds: b+ C% w/ R$ ~2 ?
faster (4:05.18) than Ye overall, creates the illusion that a woman swam
8 L- E; {9 K/ t! A9 L8 g8 c" hfaster than the best man in the same sport, which sounds impossible. Putting5 G5 i% Q3 I6 S+ L2 X- v5 f/ l
aside the gender argument, I believe this is still a leading question that
Y& e5 j% `3 _+ L. J" Mimplies to the reader that there is something fishy going on.
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! j" \ X3 c7 s# G% JFourth is another example of cherry-picking. In the same event, there are- L/ ]& s& i; V7 n
four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93$ B. R, S% o, G* @8 A) V( p- b
s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s" M3 ^! C) r0 ]
), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns
@1 a( `6 U# X( C2 S# T( Xout, if we are just talking about the last 50 metres in a 400-metre IM,6 s/ q& Y* \' [6 P; q
Lochter is not the example I would have used if I were the author. What kind
$ B9 Y3 T' q. R& o; W, ~of scientific rigorousness is Callaway trying to demonstrate here? Is it4 T* Q5 E7 a1 V
logical that if Lochter is the champion, we should assume that he leads in
! p P/ H3 z) _2 y6 D7 Ievery split? That would be a terrible way to teach the public how science
: A6 c/ C, L, K& b, n. y. _4 Yworks.& A4 V' ? `; I4 c: N, B- }
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Fifth is the issue I oppose the most. Callaway quotes Ross Tucker and! \( E& j- Z: l
implies that a drug test cannot rule out the possibility of doping. Is this8 M9 ?; ], w* Z! R8 |* V
kind of agnosticism what Nature really wants to teach its readers? By that1 B4 s' n( q4 L
standard, I estimate that at least half of the peer-reviewed scientific5 J0 u& s& i+ e* c
papers in Nature should be retracted. How can one convince the editors and5 C- K% V7 Z' p. F- [: v
reviewers that their proposed theory works for every possible case? One, M% O2 k8 o4 ~2 \4 d
cannot. One chooses to apply the theory to typical examples and to
) V7 }! U+ J8 w. }9 A9 |demonstrate that in (hopefully) all scenarios considered, the theory works
! d8 S; u3 u z4 b6 v: D1 S# {to a degree, and that that should warrant publication until a counterexample
/ @/ [% w W g% ]is found. I could imagine that Callaway has a sceptical mind, which is
. U3 i; h4 s' ] O+ g# N9 S' rcrucial to scientific thinking, but that would be put to better use if he
5 J i0 i+ S B( R( r5 awrote a peer-reviewed paper that discussed the odds of Ye doping on a highly
3 A8 `7 ^/ O9 f( \9 r0 U5 s9 z6 Ladvanced, non-detectable drug that the Chinese have come up with in the
7 s _- S7 \+ F" k. Hpast 4 years (they obviously did not have it in Beijing, otherwise why not$ d* q% i& d; f" W3 t2 R+ P
use it and woo the audience at home?), based on data and rational derivation+ l t2 @ p! _
. This article, however, can be interpreted as saying that all athletes are4 ~% a6 J3 U3 E/ C% e' T0 E
doping and the authorities are just not good enough to catch them. That may6 _ `7 H/ a, F5 i P K9 Y
be true, logically, but definitely will not make the case if there is ever a
8 M# ]# L* h. q; B, bhearing by the governing body for water sports, FINA, to determine if Ye
% f3 T. i/ D; L- ~$ ]5 L. S( shas doped. To ask whether it is possible to obtain a false negative in a
. e! f/ ~: z2 Q& b' M+ I% S) ydrug test looks like a rigged question to me. Of course it is possible:
" X( Y7 l+ ~% X/ x6 H# Z+ C* Iother than the athlete taking a drug that the test is not designed to detect
+ C& h/ P1 l/ K$ ^" b6 q# M* r, anyone who has taken quantum 101 will tell you that everything is
! _6 J) E1 Y/ l& Yprobabilistic in nature, and so there is a probability that the drug in an1 j5 q' o- W5 G. s6 `! ?
athlete’s system could tunnel out right at the moment of the test. A slight
4 I' h; t% v# d, H0 Hchance it may be, but should we disregard all test results because of it?
4 | Y. i7 J$ M; y) V- L3 d7 jLet’s be practical and reasonable, and accept that the World Anti-Doping2 {% U7 M/ Z0 D& J1 @1 `4 b
agency (WADA) is competent at its job. Ye’s urine sample will be stored for4 z' J8 I0 b/ U* e3 d8 j! X: ?
eight years after the contest for future testing as technology advances.
J+ _" f0 r1 nInnocent 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-: Y' |% e2 N8 g
competition drug test is already in effect, which Callaway failed to mention) m3 q- a5 ~: v% O! e5 L! Y
. As noted in the president of WADA’s press release, drug testing for
' S4 L' H8 W3 n3 R" COlympians began at least six months before the opening of the London
- v( u( `# \5 C$ f8 H G! IOlympics. Furthermore, 107 athletes have been banned from this Olympics for
+ p' i& A Z8 b/ H4 {doping. That may be the reason that “everyone will pass at the Olympic
1 k- g3 s* i! }) v' A2 P8 {games. Hardly anyone fails in competition testing” — those who did dope
9 u7 h) h6 \7 Y4 \) D6 }, Ehave already been caught and sanctioned. Callaway is free to suggest that a
# v% A& K% a6 `# `* {& Gplayer could have doped beforehand and fooled the test at the game, but this/ {1 V6 m. G+ f' {) q
possibility is certainly ruled out for Ye.; R5 n# q0 f* E, S
3 L6 M2 j% U0 L% K; X6 AOver all, even though Callaway did not falsify any data, he did (
, P' c& l4 F) {. E6 l; D7 F2 Vintentionally or not) cherry-pick data that, in my view, are far too
0 N" x. q8 d. W0 ^2 K- S% Gsuggestive to be fair and unbiased. If you want to cover a story of a4 t5 B6 G0 ?' `: t3 A4 w
suspected doping from a scientific point of view, be impartial and provide
O+ N6 E" V9 N; L) C& v/ Y& ?) x ^all the facts for the reader to judge. You are entitled to your
7 f6 H) |) A$ J$ K Ainterpretation of the facts, and the expression thereof in your piece,3 z( { z' q2 k) h
explicitly or otherwise, but showing only evidence that favours your
" A% Q8 \3 t0 k. e5 P- G; C( k* dargument is hardly good science or journalism. Such an article in a journal
) x2 _& a0 Q# B: tsuch as Nature is not an appropriate example of how scientific research or
; C9 `2 y( a! |0 {reporting should be done. |
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