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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- ?6 M# Y5 S; y' W
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' r0 r1 y" q* @
, regard as one of the most prestigious and influential physical-science
5 |7 \, x$ [" U$ A$ Dmagazines — publish a thinly veiled biased article like this. Granted, this4 g9 J" Y5 T# ?
is not a peer-reviewed scientific article and did not go through the
2 E7 { S2 A) ?scrutiny of picking referees. But to serve as a channel for the general/ z4 O% P0 \$ p& a+ f. P. r& U n/ f6 G
populace to be in touch with and appreciate science, the authors and editors
2 `& _! s# ]( o+ K+ h: _9 Kshould at least present the readers with facts within the proper context,
9 D: C% E# z5 K" Awhich they blatantly failed to do.8 W5 H* b. h8 h! [* Z$ K
: K' x2 D4 I( m# fFirst, to identify Ye’s performance increase, Ewen Callaway compared her
* y( E" u- I: g' N5 P( W5 AOlympic 400-metre IM time with her performance at the World Championships in- }" x( H* \/ B8 M; P. B+ _7 V
2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “
$ y. f" x6 u' d( janomalous” improvement of around 7 seconds (6.72 s). In fact, her previous& |6 H# j% j( m. r/ P/ x, C* W
personal best was 4:33.79 at the Asian Games in 2010. This leads to an V: E) r! K9 e' v& u2 b: S
improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the% Z! g/ } Q A7 i/ q* {4 m- c
difference between the gold and silver medal, I see no reason for 5.38 s to
* c7 @+ e, P( A {! tbe treated as 7 s.
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Second, as previously pointed out, Ye is only 16 years old and her body is8 y# `, i" ]- t# ^/ ?$ y
still developing. Bettering oneself by 5 seconds over two years may seem
. x2 B2 S2 L7 vimpossible for an adult swimmer, but it certainly happens among youngsters.6 S {/ N7 Z) O" z H }3 L, @ t
An interview with Australian gold medallist Ian Thorpe revealed that his 400
5 C* y% i1 B1 v( ]1 j-metre freestyle time improved by 5 seconds between the ages of 15 and 16.5 _" h& j3 l, T8 g
For regular people, including Callaway, it may be hard to imagine what an) g8 [1 p' ~4 x: y4 C& b
elite swimmer can achieve as he or she matures and undergoes scientific and
" k8 G! k5 r/ q O" t/ Bpersistent training. But jumping to the conclusion that it is “anomalous”
) N1 c2 @ W+ \) M- c) i( }based on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.
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Third, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook
$ d8 [: C9 a5 r- G, fexample of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in
3 f. j, u5 T( ]; s# C4 u% S8 Athe last 50 metres, but Lochte had a huge lead in the first 300 metres, so$ d. O( Y/ @: w5 M
he chose not to push himself too hard and to conserve his energy for later
3 ?# j/ F! U) F+ oevents (whether this conforms to the Olympic spirit and the ‘use one’s
/ g6 ]. w3 _5 h6 v# X; C/ Abest efforts to win a match’ requirement that the Badminton World. C. R; c) ^6 z# S# c
Federation recently invoked to disqualify four badminton pairs is another
! [6 l' I/ k, ]( H& D$ ptopic worth discussing, though probably not in Nature). Ye, on the other
9 d# |5 \$ Q5 c& w3 N8 `hand, was trailing behind after the first 300 metres and relied on freestyle
5 I }" N8 A. ? _: e) H) R; p, in which she has an edge, to win the race. Failing to mention this$ b% p. C5 [5 H( j) p+ O' `+ {! A' u
strategic difference, as well as the fact that Lochte is 23.25 seconds9 O9 |. P1 L+ R
faster (4:05.18) than Ye overall, creates the illusion that a woman swam
1 D4 I1 m5 k) sfaster than the best man in the same sport, which sounds impossible. Putting. d$ J" z8 Y5 e% a- a% Q( w
aside the gender argument, I believe this is still a leading question that; r r- D) ?" K5 f' X
implies to the reader that there is something fishy going on.% E: F- ~- J2 L' Q
; ~9 A, s$ }& sFourth is another example of cherry-picking. In the same event, there are- x J i% ^3 v
four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93* ?6 [' n" j& B; F
s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s& O) e+ }9 ^6 M0 ]
), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns
. v1 S- V4 A4 v# q6 J8 zout, if we are just talking about the last 50 metres in a 400-metre IM,! i7 g6 M0 L! ~, ?' O N5 l
Lochter is not the example I would have used if I were the author. What kind
& o6 s* h2 G9 q; B5 }of scientific rigorousness is Callaway trying to demonstrate here? Is it/ K8 c, b$ z2 H1 B
logical that if Lochter is the champion, we should assume that he leads in7 e( j/ Q) ^: X: A( b5 o' e
every split? That would be a terrible way to teach the public how science5 q& Y; P1 h$ e: A6 V
works.
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Fifth is the issue I oppose the most. Callaway quotes Ross Tucker and
9 V+ x& Z: `4 }implies that a drug test cannot rule out the possibility of doping. Is this
9 N2 J7 h9 T2 Q% r& ykind of agnosticism what Nature really wants to teach its readers? By that# H2 D4 d" o$ \) e9 T4 y4 X' q
standard, I estimate that at least half of the peer-reviewed scientific+ z* [( F% ^% i( q+ b, l" i% \
papers in Nature should be retracted. How can one convince the editors and
' J, y9 D% C5 _! Sreviewers that their proposed theory works for every possible case? One
# h1 n9 H2 R$ d4 M4 V9 gcannot. One chooses to apply the theory to typical examples and to
0 u% a5 x0 C% }* m; @+ n3 c( pdemonstrate that in (hopefully) all scenarios considered, the theory works
" w! @4 U% U: w/ @2 C- L6 vto a degree, and that that should warrant publication until a counterexample
/ }4 p4 h, {! N$ D% e9 B2 Q+ gis found. I could imagine that Callaway has a sceptical mind, which is! Q9 q3 \ b1 j8 k( f! T
crucial to scientific thinking, but that would be put to better use if he3 e9 i5 r: |! u$ |
wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly7 \- w: u p( W" v2 X1 _ j* y, @
advanced, non-detectable drug that the Chinese have come up with in the6 f+ K, ]& _! i& Y
past 4 years (they obviously did not have it in Beijing, otherwise why not' c2 U3 H* N6 ?/ z; \; e, h
use it and woo the audience at home?), based on data and rational derivation
& k, w4 O9 ^7 w" o. This article, however, can be interpreted as saying that all athletes are
) [, ]' l" L: F2 J$ E4 Sdoping and the authorities are just not good enough to catch them. That may+ Z. \/ x1 j @
be true, logically, but definitely will not make the case if there is ever a( ]" U0 y6 }+ k+ A0 ^1 Y
hearing by the governing body for water sports, FINA, to determine if Ye, ~. o+ H/ c& ]' W! g6 M5 P
has doped. To ask whether it is possible to obtain a false negative in a
, L1 ]0 c/ |3 q) H& ^drug test looks like a rigged question to me. Of course it is possible:- C$ P; e$ _- Q# K7 D3 {
other than the athlete taking a drug that the test is not designed to detect7 B+ a# |: e) s c, r+ P) B8 n
, anyone who has taken quantum 101 will tell you that everything is, ?! Y" a: D) _* T& ?8 Y9 ^
probabilistic in nature, and so there is a probability that the drug in an0 I7 r5 Q3 o. u) A0 }% b1 R0 d
athlete’s system could tunnel out right at the moment of the test. A slight& A) ]4 h) J( Z/ U1 g" M' x% C
chance it may be, but should we disregard all test results because of it?
9 x0 L) Y4 q0 L7 j2 ]3 t7 ?Let’s be practical and reasonable, and accept that the World Anti-Doping
# n* Z- U! g6 [( z- nagency (WADA) is competent at its job. Ye’s urine sample will be stored for
4 k0 m, g% T( F) c' O6 H, k& Veight years after the contest for future testing as technology advances.5 v) R3 n6 e/ p: K' z( n" W
Innocent until proven guilty, shouldn’t it be?, z+ ]! m1 t: ?1 ]# s# `. m
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Sixth, and the last point I would like to make, is that the out-of-
6 T `$ L+ v! u* h, f4 t& Ecompetition drug test is already in effect, which Callaway failed to mention4 N* M" h8 I, b1 p8 P! ~) _3 U
. As noted in the president of WADA’s press release, drug testing for
3 N' d) m& n& R4 |Olympians began at least six months before the opening of the London
; V) M# y) }9 |& J6 E3 ~2 gOlympics. Furthermore, 107 athletes have been banned from this Olympics for
2 t% _7 q! A7 O# i5 mdoping. That may be the reason that “everyone will pass at the Olympic
8 W$ c. ?9 Y" @; B* p! Igames. Hardly anyone fails in competition testing” — those who did dope
+ ]- d) {4 Y8 {, l* {- n9 w9 }5 Y- F/ }have already been caught and sanctioned. Callaway is free to suggest that a
+ B6 _% Z5 q9 v6 v' iplayer could have doped beforehand and fooled the test at the game, but this) q. c' @+ y, |9 P% J
possibility is certainly ruled out for Ye.
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Over all, even though Callaway did not falsify any data, he did (8 e0 A% w! |' U* {3 p) J
intentionally or not) cherry-pick data that, in my view, are far too1 V3 m2 }% j, Q$ J: d
suggestive to be fair and unbiased. If you want to cover a story of a5 x* Q# {/ ?. M* V% V
suspected doping from a scientific point of view, be impartial and provide! L6 u. ], g( f# M- W
all the facts for the reader to judge. You are entitled to your
, `) W8 x9 R: K( {' S# Zinterpretation of the facts, and the expression thereof in your piece," P% F$ X: I z
explicitly or otherwise, but showing only evidence that favours your3 w2 g+ g; k M. _0 Y
argument is hardly good science or journalism. Such an article in a journal
6 O. J& l7 J. k- J7 W) t# Rsuch as Nature is not an appropriate example of how scientific research or9 ]* m# b0 W# E* |
reporting should be done. |
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