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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+ H4 t% ^9 m' R: c
如果是中国长大的,英语能到这种程度真是很不简单。2 p& }1 T' Z) l3 u- J/ Z4 J
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http://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html: H8 N+ n( w2 [
( K' V3 h5 q$ w" t5 v& }$ oFROM LAI JIANG, Department of Chemistry, University of Pennsylvania9 A* @1 E5 h t; o( Z
0 q/ w/ j( T! y$ V/ T" dIt is a shame to see Nature — which nearly all scientists, including myself
- r: b/ L8 d) |, regard as one of the most prestigious and influential physical-science4 @; ?/ j7 t2 a2 j
magazines — publish a thinly veiled biased article like this. Granted, this* e4 F$ Z4 _# ^. E8 k2 ], B, @
is not a peer-reviewed scientific article and did not go through the
" c7 v7 K/ c+ f; A; Hscrutiny of picking referees. But to serve as a channel for the general6 y. V* z* d- d& L1 J, C9 v3 @ b
populace to be in touch with and appreciate science, the authors and editors" V" V$ E8 {! e# M6 ?3 U+ L( o+ T
should at least present the readers with facts within the proper context,
) l7 x/ f% k) K/ Hwhich they blatantly failed to do.
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First, to identify Ye’s performance increase, Ewen Callaway compared her
, d" o7 c! X; @Olympic 400-metre IM time with her performance at the World Championships in
5 Z+ k6 Z ], N3 Z( B* [7 N2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “
+ f! \, {2 X+ X! X2 k1 V, Qanomalous” improvement of around 7 seconds (6.72 s). In fact, her previous
- h9 |2 H) S$ P% \! w& ~; m7 Npersonal best was 4:33.79 at the Asian Games in 2010. This leads to an2 [6 P1 S2 y5 l# |% v/ x) ]
improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the
r% z. A" [& m1 d( k- z8 odifference between the gold and silver medal, I see no reason for 5.38 s to
+ x% n9 l& V4 k: N6 J+ obe treated as 7 s.& `# g r' H' p! D/ }$ ~
( d5 I! B* a, E* z8 N# l1 R' @$ {: lSecond, as previously pointed out, Ye is only 16 years old and her body is
1 e5 h C3 V& H6 @. N! Z W0 K0 A$ @still developing. Bettering oneself by 5 seconds over two years may seem
( o# J8 ~+ K* [* d+ rimpossible for an adult swimmer, but it certainly happens among youngsters.2 A# S- H7 S b; I' |3 g
An interview with Australian gold medallist Ian Thorpe revealed that his 400
8 C" ?$ p0 |; @6 [-metre freestyle time improved by 5 seconds between the ages of 15 and 16.
7 M& i# F3 t2 c7 ^- dFor regular people, including Callaway, it may be hard to imagine what an. k% T2 Y9 w0 L* r
elite swimmer can achieve as he or she matures and undergoes scientific and
9 ?: K; G0 ^+ X5 O7 b6 v( W6 b- epersistent training. But jumping to the conclusion that it is “anomalous”+ h0 e! B: Z9 T" p' o' \9 t
based on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.; g2 T( M4 } q
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Third, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook9 o4 z0 s' k9 b& e
example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in3 e0 g5 e* ]7 s: _1 r% c: V
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so
! {0 l1 E3 n0 ]7 B2 Khe chose not to push himself too hard and to conserve his energy for later( d* c" v; z8 }" C6 y; B
events (whether this conforms to the Olympic spirit and the ‘use one’s% P- _) F5 m3 Z- y3 V- ?' O5 Z
best efforts to win a match’ requirement that the Badminton World
, a `* Z8 [' x) L; }Federation recently invoked to disqualify four badminton pairs is another
6 y, d1 i5 b' W/ _6 _topic worth discussing, though probably not in Nature). Ye, on the other
3 r# [( o2 w: p" D2 L7 ]' Yhand, was trailing behind after the first 300 metres and relied on freestyle8 c8 b2 `+ K4 G( _. b: N
, in which she has an edge, to win the race. Failing to mention this
# ~! I) N8 b: i2 estrategic difference, as well as the fact that Lochte is 23.25 seconds
% R, f) c: [3 W; O" S. G2 _1 T& \' Pfaster (4:05.18) than Ye overall, creates the illusion that a woman swam
* {! x$ ?5 x3 G N/ Efaster than the best man in the same sport, which sounds impossible. Putting. E* ~, R( _' g2 `# k* l9 n$ A
aside the gender argument, I believe this is still a leading question that% y" ~( [+ t8 A& {" k# _/ S
implies to the reader that there is something fishy going on.7 R V" K9 q* \6 V' s% [( s0 H B
! s( }( }1 \0 w, X* I% e5 h; yFourth is another example of cherry-picking. In the same event, there are8 @8 i' L; i/ p* a1 z
four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.935 u, Z1 G5 V# c) U- t7 y
s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s f6 q a% U0 \
), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns5 d" m9 r! i- y4 D3 ?: e2 Q
out, if we are just talking about the last 50 metres in a 400-metre IM,
) ^" q I3 H! h) aLochter is not the example I would have used if I were the author. What kind( g" [! \5 I3 ^1 l+ y0 Z; e( H7 @
of scientific rigorousness is Callaway trying to demonstrate here? Is it* D& t; l; G) Y+ d# V% T) X: s, t
logical that if Lochter is the champion, we should assume that he leads in
/ @; [5 j' d# T+ C; m; p9 i3 W3 Fevery split? That would be a terrible way to teach the public how science
5 z5 z. Y: W: d) \2 Y7 E8 pworks.' d+ \- Z( Q* u8 C
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Fifth is the issue I oppose the most. Callaway quotes Ross Tucker and
) A0 u' D) R. n7 D G; P7 X. l/ k; simplies that a drug test cannot rule out the possibility of doping. Is this
9 X/ _. j/ x6 Q. @ Bkind of agnosticism what Nature really wants to teach its readers? By that
. E d1 T( l4 E9 O; cstandard, I estimate that at least half of the peer-reviewed scientific* O8 j2 }* V4 N/ W3 p& O
papers in Nature should be retracted. How can one convince the editors and& [& C8 h& t6 o! R) Z
reviewers that their proposed theory works for every possible case? One
) Z5 [- h! s& T" S" O9 acannot. One chooses to apply the theory to typical examples and to7 q/ o" \7 U3 D5 q, i
demonstrate that in (hopefully) all scenarios considered, the theory works# r# k# T) o: R6 L8 B5 l
to a degree, and that that should warrant publication until a counterexample( r. i, x$ T9 u
is found. I could imagine that Callaway has a sceptical mind, which is6 R6 t3 i7 m0 A( {' J: M: s- D
crucial to scientific thinking, but that would be put to better use if he) }+ W, L/ T% J6 W \2 u' ]
wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly
9 d# Q$ }8 R; qadvanced, non-detectable drug that the Chinese have come up with in the5 A w3 B' ]( m3 k) w0 }( k: X1 p
past 4 years (they obviously did not have it in Beijing, otherwise why not
3 y% p; S8 t: s2 quse it and woo the audience at home?), based on data and rational derivation* J, K% @; L9 [& i5 ^& h+ Y
. This article, however, can be interpreted as saying that all athletes are
% e- S- l5 y4 r$ E3 }- adoping and the authorities are just not good enough to catch them. That may6 M$ {4 N- f1 Y) w/ I8 W
be true, logically, but definitely will not make the case if there is ever a3 {# g0 `0 B) `0 w0 L: _/ Y" D
hearing by the governing body for water sports, FINA, to determine if Ye4 C3 H% ^" G' }1 f# l X
has doped. To ask whether it is possible to obtain a false negative in a
1 T( n- b4 g9 f' F3 Cdrug test looks like a rigged question to me. Of course it is possible:, \3 k5 J7 } S, U
other than the athlete taking a drug that the test is not designed to detect: _) \9 f+ b4 Z5 `! Y
, anyone who has taken quantum 101 will tell you that everything is
4 x& U& Y6 W: I' ]) u+ k& v; Yprobabilistic in nature, and so there is a probability that the drug in an! c, l& m: ^& M- X
athlete’s system could tunnel out right at the moment of the test. A slight8 Q7 d- }5 m9 o) u; S4 a2 E, D
chance it may be, but should we disregard all test results because of it?
1 G, c! N9 l5 d! OLet’s be practical and reasonable, and accept that the World Anti-Doping" Y" L8 M8 _8 C+ j
agency (WADA) is competent at its job. Ye’s urine sample will be stored for6 n* Z" R1 c4 E! n. A
eight years after the contest for future testing as technology advances., ?- C; D8 }! u {/ a- g" \
Innocent until proven guilty, shouldn’t it be?, ^2 b- N. ~! m M( X% ]
1 ] L8 v" m, t; K0 \Sixth, and the last point I would like to make, is that the out-of-1 E! y5 V' e) R, r5 T$ o0 R
competition drug test is already in effect, which Callaway failed to mention4 g0 E7 Q! S& T0 D1 B% m# o
. As noted in the president of WADA’s press release, drug testing for
6 _0 q1 T# a+ A7 K7 Z+ V1 O- UOlympians began at least six months before the opening of the London
4 w4 Y( Y( h5 ~) k" E2 SOlympics. Furthermore, 107 athletes have been banned from this Olympics for
9 }" M7 C$ e, C+ v7 F8 g" h0 r h7 J9 ^doping. That may be the reason that “everyone will pass at the Olympic5 B0 y/ j0 @/ M2 f* {; {# M4 a
games. Hardly anyone fails in competition testing” — those who did dope
+ ~+ e* \+ b! t% m4 S) \have already been caught and sanctioned. Callaway is free to suggest that a
8 G4 _" v7 g- g) W) l Mplayer could have doped beforehand and fooled the test at the game, but this
# q$ e. j5 H2 p3 xpossibility is certainly ruled out for Ye.
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3 R" N* u3 v lOver all, even though Callaway did not falsify any data, he did (
4 @2 c6 N4 T; m* H$ n6 V6 Mintentionally or not) cherry-pick data that, in my view, are far too
! l$ p* ~4 Q8 L3 C" }2 ?suggestive to be fair and unbiased. If you want to cover a story of a
; p! a `& W/ a! d, Asuspected doping from a scientific point of view, be impartial and provide
+ q! H) A) g8 u0 E( Dall the facts for the reader to judge. You are entitled to your5 `5 I, U6 a, c3 T
interpretation of the facts, and the expression thereof in your piece,
7 I$ j& s2 a8 \! o, g, }explicitly or otherwise, but showing only evidence that favours your
1 _0 m, O$ s) A9 M% x+ nargument is hardly good science or journalism. Such an article in a journal' p$ {7 ^' r- B
such as Nature is not an appropriate example of how scientific research or
0 f$ e# O9 b$ l) ?" Treporting should be done. |
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