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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
* x5 }6 A+ o5 w9 Y如果是中国长大的,英语能到这种程度真是很不简单。. X6 A) K% h7 i" V& D& ?* A
" j! C! n6 X- X0 K. fhttp://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html
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FROM LAI JIANG, Department of Chemistry, University of Pennsylvania( U6 Y3 \. W% D) b% z3 ?+ l0 H
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It is a shame to see Nature — which nearly all scientists, including myself9 N& e W) a0 A- p) D- |' M2 @
, regard as one of the most prestigious and influential physical-science
- E# u# }4 U9 | p- v0 Cmagazines — publish a thinly veiled biased article like this. Granted, this
0 `0 M% ?, O6 m: O/ ~. ~7 W. `is not a peer-reviewed scientific article and did not go through the! i5 O" O1 h! w7 K- Q+ ]
scrutiny of picking referees. But to serve as a channel for the general( p v( `: {# ?
populace to be in touch with and appreciate science, the authors and editors) D: _$ o+ G5 j9 K! o- D7 _
should at least present the readers with facts within the proper context,
% v# Q9 W/ ]0 Y) |: i1 s1 awhich they blatantly failed to do.: q1 T5 [ B/ m
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First, to identify Ye’s performance increase, Ewen Callaway compared her$ K$ @! q. ^! Z1 E7 }- Q2 n
Olympic 400-metre IM time with her performance at the World Championships in
, p2 M7 x5 h; E7 t7 V8 r2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “$ q: V+ Z0 o7 o
anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous* C- J: _3 I" t% P
personal best was 4:33.79 at the Asian Games in 2010. This leads to an0 t1 r) w8 W8 `) n8 b) r9 Q. m
improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the7 [, [+ b6 x' r5 Y2 J( T
difference between the gold and silver medal, I see no reason for 5.38 s to& j( ]6 Q, M% p
be treated as 7 s.
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Second, as previously pointed out, Ye is only 16 years old and her body is
3 ~2 Q- _. b6 z$ J3 Y% Y* Nstill developing. Bettering oneself by 5 seconds over two years may seem$ Y; ^. M4 Q+ u* U- s) b4 c
impossible for an adult swimmer, but it certainly happens among youngsters.; r% Y6 t6 G# c, l
An interview with Australian gold medallist Ian Thorpe revealed that his 400
9 r. H0 z9 n8 e-metre freestyle time improved by 5 seconds between the ages of 15 and 16.
' Q* H2 Y9 X3 n0 D' WFor regular people, including Callaway, it may be hard to imagine what an! N+ o8 B2 t( V+ U9 R
elite swimmer can achieve as he or she matures and undergoes scientific and3 Z; Z4 @9 v8 n4 U! O# x
persistent training. But jumping to the conclusion that it is “anomalous”
0 D) h. q5 D- H! k. S' Rbased on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound./ c' N/ c9 D6 ~4 N& D
4 _! r2 O; j4 K. V" g9 G& V6 FThird, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook& x% s- O* h5 o7 d( ?' a' J3 ~
example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in
4 [" d' ~- Y( u7 g2 w7 Pthe last 50 metres, but Lochte had a huge lead in the first 300 metres, so
1 v6 J" y& _& C, Fhe chose not to push himself too hard and to conserve his energy for later
2 P( B, O' S: ^( w( F: L7 Hevents (whether this conforms to the Olympic spirit and the ‘use one’s
( y/ `0 I/ J* x9 i P- I4 W7 b% S7 nbest efforts to win a match’ requirement that the Badminton World2 r+ {$ b, Z5 f+ Y1 D% t
Federation recently invoked to disqualify four badminton pairs is another
8 [& o6 ^ D% s! ^1 ~topic worth discussing, though probably not in Nature). Ye, on the other; c6 Y* A+ q8 w; H$ e% m
hand, was trailing behind after the first 300 metres and relied on freestyle
w) {2 t+ e' O# e, in which she has an edge, to win the race. Failing to mention this
& {1 Y; @+ A( O3 E. xstrategic difference, as well as the fact that Lochte is 23.25 seconds$ i' O" ^$ f- o, c. S7 R
faster (4:05.18) than Ye overall, creates the illusion that a woman swam
$ [5 x6 \, \* n% y2 D9 `faster than the best man in the same sport, which sounds impossible. Putting# j- ]1 j- Z" Y+ p
aside the gender argument, I believe this is still a leading question that
5 \ Q; v* [% r9 t8 C$ e) N# N: q* dimplies to the reader that there is something fishy going on.6 a0 }5 l" o3 ^( O) \, Z
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Fourth is another example of cherry-picking. In the same event, there are
. ^0 \% l6 d1 [6 M% Sfour male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93% c% y5 E4 _! m/ B1 j o8 ~+ U6 ^
s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s
3 d& q5 I. s+ f# M/ g# _), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns# b9 r7 m% C) p& `, l: T
out, if we are just talking about the last 50 metres in a 400-metre IM,
l) r7 }5 w# A( ELochter is not the example I would have used if I were the author. What kind2 L( k* m1 H4 g* b, \& K1 g4 O( [
of scientific rigorousness is Callaway trying to demonstrate here? Is it
6 H1 C+ J6 o( G2 W! K- u; Rlogical that if Lochter is the champion, we should assume that he leads in
" V4 o; ]; F7 T1 X6 Z1 \every split? That would be a terrible way to teach the public how science! ] {1 a+ R7 u1 ^* g
works.
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Fifth is the issue I oppose the most. Callaway quotes Ross Tucker and% a* i1 ?3 |% k; V* L
implies that a drug test cannot rule out the possibility of doping. Is this
/ Q- ]( j# ]$ G5 B) m9 K9 w) _kind of agnosticism what Nature really wants to teach its readers? By that
3 l) |) b5 T- d h% ustandard, I estimate that at least half of the peer-reviewed scientific
; q6 D+ y4 B6 _- G4 apapers in Nature should be retracted. How can one convince the editors and
( I4 ]- I/ t1 w! Z4 y. Nreviewers that their proposed theory works for every possible case? One7 b5 l, d7 m. T. y; ^6 y/ s
cannot. One chooses to apply the theory to typical examples and to
3 O: j7 p0 A, xdemonstrate that in (hopefully) all scenarios considered, the theory works6 o1 v5 N6 r+ I1 l
to a degree, and that that should warrant publication until a counterexample7 E. G0 M/ _/ X
is found. I could imagine that Callaway has a sceptical mind, which is
. [# {5 l9 M" c' e' B6 }- gcrucial to scientific thinking, but that would be put to better use if he
1 X8 S# y5 p p( y* b1 k" o3 vwrote a peer-reviewed paper that discussed the odds of Ye doping on a highly) p7 n7 S; \/ G1 N# |9 T8 `4 y' }
advanced, non-detectable drug that the Chinese have come up with in the5 O, X' h( P, D0 {4 h6 t
past 4 years (they obviously did not have it in Beijing, otherwise why not
_+ z& B, A Ruse it and woo the audience at home?), based on data and rational derivation
# j5 K1 W/ |7 a9 g. H A. This article, however, can be interpreted as saying that all athletes are' u; p. ], j/ S! K" ?5 ?
doping and the authorities are just not good enough to catch them. That may% m* Z; u4 q/ q# U" ?! K) H
be true, logically, but definitely will not make the case if there is ever a
2 g5 \1 m L7 i& V( h$ o: Ehearing by the governing body for water sports, FINA, to determine if Ye
, e/ {* M. g S N$ f9 ]7 Q Ohas doped. To ask whether it is possible to obtain a false negative in a
. @+ P, Z4 K0 X2 \drug test looks like a rigged question to me. Of course it is possible:0 D2 e- z3 F: y3 T- z2 |( [6 R
other than the athlete taking a drug that the test is not designed to detect
$ c/ M! p5 R. W; S, anyone who has taken quantum 101 will tell you that everything is
( M9 Z5 M% z* q. xprobabilistic in nature, and so there is a probability that the drug in an
& C) l1 v b( [6 g- f. R/ B& j( Jathlete’s system could tunnel out right at the moment of the test. A slight8 r/ h" t' O9 i, n- c
chance it may be, but should we disregard all test results because of it?
3 c; F1 a1 j8 s: iLet’s be practical and reasonable, and accept that the World Anti-Doping; [2 n- ?% V1 K
agency (WADA) is competent at its job. Ye’s urine sample will be stored for
# O! v$ T( \. E* L6 \eight years after the contest for future testing as technology advances., k4 z/ P& N" F* y7 B
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-
$ Z. O- h0 P9 v) z5 W- G/ F7 F8 q# Xcompetition drug test is already in effect, which Callaway failed to mention U9 c( p" H/ ]1 G1 ~5 a
. As noted in the president of WADA’s press release, drug testing for1 M9 H; C1 X3 e0 X2 x! j8 r
Olympians began at least six months before the opening of the London
* t- d9 I! z) QOlympics. Furthermore, 107 athletes have been banned from this Olympics for9 f# }5 P# |! ~
doping. That may be the reason that “everyone will pass at the Olympic% i! M" H; S# D5 R* {! r
games. Hardly anyone fails in competition testing” — those who did dope. j; N9 [5 a! ~3 h# g. R- n/ R
have already been caught and sanctioned. Callaway is free to suggest that a' k& {, n% p- s( n
player could have doped beforehand and fooled the test at the game, but this. [. L( ]/ `2 L
possibility is certainly ruled out for Ye.- ?* f; ^. b8 k0 ?! c& v
- T* z; x% b4 o$ f4 V4 T* rOver all, even though Callaway did not falsify any data, he did (/ E h p" H! ]7 R" g1 ~
intentionally or not) cherry-pick data that, in my view, are far too2 E6 f% V7 d/ R. I$ N( q
suggestive to be fair and unbiased. If you want to cover a story of a4 C( K+ N6 p2 I1 m ~3 r( m
suspected doping from a scientific point of view, be impartial and provide/ X8 V' ?# Z2 \: [( e/ p0 j
all the facts for the reader to judge. You are entitled to your
% ]6 a4 y- b$ j0 c. S! }* B! w9 Xinterpretation of the facts, and the expression thereof in your piece,
5 E3 }. s6 p+ R- M, }explicitly or otherwise, but showing only evidence that favours your
! @ Q: X% g' Q$ targument is hardly good science or journalism. Such an article in a journal
8 o# u5 {5 ?6 b9 Usuch as Nature is not an appropriate example of how scientific research or& A9 f( g) Q: J
reporting should be done. |
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