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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
0 F! z& {8 h8 y2 i+ J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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% _, J( a' _/ shttp://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html
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1 w* e' N4 I2 x* p$ }0 WFROM 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
8 i9 X- @2 s5 I G) u: U, regard as one of the most prestigious and influential physical-science
; M$ W+ x/ m) j3 \& v( o jmagazines — publish a thinly veiled biased article like this. Granted, this2 h! u Y" B1 x/ b
is not a peer-reviewed scientific article and did not go through the# y$ y8 o' q d+ R4 {
scrutiny of picking referees. But to serve as a channel for the general( h& j8 X. ?; V2 N
populace to be in touch with and appreciate science, the authors and editors
9 k4 t Y) z. h/ I2 w) w5 Ashould at least present the readers with facts within the proper context,1 z$ X4 Q( d5 |3 L, N
which they blatantly failed to do.
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First, to identify Ye’s performance increase, Ewen Callaway compared her
/ I: Q( {2 ?# kOlympic 400-metre IM time with her performance at the World Championships in
. b0 x. U" o$ p6 i( I3 a2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “
6 ~/ e) Q% J9 \$ o0 \0 N( Hanomalous” improvement of around 7 seconds (6.72 s). In fact, her previous3 O) Z7 q: F( k; M
personal best was 4:33.79 at the Asian Games in 2010. This leads to an1 U" }5 ~1 g5 x* g1 ^
improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the
4 ~' c% l0 p/ tdifference between the gold and silver medal, I see no reason for 5.38 s to5 o* f1 \0 q3 D
be treated as 7 s.
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9 X0 c1 Z8 L9 MSecond, as previously pointed out, Ye is only 16 years old and her body is
. ]+ I, w/ I% R* _6 y8 N; x" Kstill developing. Bettering oneself by 5 seconds over two years may seem
9 ?; Q, h6 n9 j5 ^7 P% P# Fimpossible for an adult swimmer, but it certainly happens among youngsters.0 P# k3 p4 ^& n6 z4 P! ]% z
An interview with Australian gold medallist Ian Thorpe revealed that his 400% W" X# V! ]+ ]$ K# C# t
-metre freestyle time improved by 5 seconds between the ages of 15 and 16.
7 p, _ s' [* l) [" XFor regular people, including Callaway, it may be hard to imagine what an
( I: D( X/ ~7 u, j0 u( Delite swimmer can achieve as he or she matures and undergoes scientific and
6 K9 T% F% r' E$ ?persistent training. But jumping to the conclusion that it is “anomalous”7 E% w- e" p; Y
based on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.
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. ~1 ?" s* @, N) F7 z" N CThird, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook
( V" D4 `8 @2 G# g' c( O/ C7 Y! ?example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in
* J8 _- `; N1 Jthe last 50 metres, but Lochte had a huge lead in the first 300 metres, so! c' \) l& J5 v' E- j
he chose not to push himself too hard and to conserve his energy for later
4 ]0 K; M% {% k% fevents (whether this conforms to the Olympic spirit and the ‘use one’s* _( Q4 |0 q% ]1 J
best efforts to win a match’ requirement that the Badminton World
8 N# O! u: x" LFederation recently invoked to disqualify four badminton pairs is another
% i) X% E, o f# f+ `topic worth discussing, though probably not in Nature). Ye, on the other. E7 o: v$ h5 ?! g5 p
hand, was trailing behind after the first 300 metres and relied on freestyle
Z1 [) J" \2 D0 r* P1 c, in which she has an edge, to win the race. Failing to mention this/ U; j5 u5 ]2 A4 S2 A
strategic difference, as well as the fact that Lochte is 23.25 seconds3 x( q( t8 N% s) x( |1 X
faster (4:05.18) than Ye overall, creates the illusion that a woman swam
' E, h! ^! \. r) Z4 F) k' U9 o) efaster than the best man in the same sport, which sounds impossible. Putting. c# \: } ^. |9 ?: @4 ]
aside the gender argument, I believe this is still a leading question that* q4 \8 @* I3 B
implies to the reader that there is something fishy going on.
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7 P+ `! o7 j' }0 s, d2 w2 VFourth is another example of cherry-picking. In the same event, there are" F, t# x" G* [6 k+ n. ^
four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93
, q3 T# }. Z3 V$ S% e0 f7 ], ^s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s- K: \/ S5 _2 |# I# W0 C
), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns" N$ y+ P, E, c" ~4 m% l7 F; S7 W
out, if we are just talking about the last 50 metres in a 400-metre IM,( X7 Q7 b& b! h8 K9 k I% M
Lochter is not the example I would have used if I were the author. What kind" U* [' [/ z" v. h$ T
of scientific rigorousness is Callaway trying to demonstrate here? Is it# i! }& g7 T% c6 \8 L4 \7 P7 n& [8 |
logical that if Lochter is the champion, we should assume that he leads in" T4 N7 e( F1 y) |' c* A
every split? That would be a terrible way to teach the public how science! I* D9 b& M. s. ?+ J* {0 j
works.
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" Y' P5 R. P# T8 i+ NFifth is the issue I oppose the most. Callaway quotes Ross Tucker and
5 T: k* B) B6 b- f9 Jimplies that a drug test cannot rule out the possibility of doping. Is this2 b4 ?0 i/ H1 ?8 {0 o2 k
kind of agnosticism what Nature really wants to teach its readers? By that+ I9 x) U$ M5 v0 O, ^
standard, I estimate that at least half of the peer-reviewed scientific) ?* H- Q4 d8 k r0 k0 Y
papers in Nature should be retracted. How can one convince the editors and
9 B+ K M% f: [reviewers that their proposed theory works for every possible case? One+ O/ D8 q" X3 H8 Z0 W
cannot. One chooses to apply the theory to typical examples and to; p5 a3 q. n7 _3 ~- m: h: G s1 ~8 d' Z
demonstrate that in (hopefully) all scenarios considered, the theory works
; z" R5 A2 A5 f) a% t) q1 C3 L4 xto a degree, and that that should warrant publication until a counterexample, b1 \2 q8 |5 c/ \; r
is found. I could imagine that Callaway has a sceptical mind, which is( D5 I' ]# r8 U t& g$ q) x2 m
crucial to scientific thinking, but that would be put to better use if he$ ]: _) A/ j8 n* B, c1 |
wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly* k$ ?% x- z3 N
advanced, non-detectable drug that the Chinese have come up with in the0 V, N% {3 t5 P0 [
past 4 years (they obviously did not have it in Beijing, otherwise why not
- a, S- {9 c. Y- ~/ _) z$ Euse it and woo the audience at home?), based on data and rational derivation7 b4 d' K3 Y# O; r- B
. This article, however, can be interpreted as saying that all athletes are
3 E) P# S) K; t6 s; S6 }9 gdoping and the authorities are just not good enough to catch them. That may
- r% f. y6 w9 wbe true, logically, but definitely will not make the case if there is ever a
& h. G2 |, N9 `. F c) |hearing by the governing body for water sports, FINA, to determine if Ye
4 B; k( Q% D! u& T2 k( G5 fhas doped. To ask whether it is possible to obtain a false negative in a
6 u+ O( L$ n. T/ B( b; Wdrug test looks like a rigged question to me. Of course it is possible:
* `/ i% Q# r6 Z8 `" {( {other than the athlete taking a drug that the test is not designed to detect* ^$ ]/ o' `& p2 `9 y0 p; \
, anyone who has taken quantum 101 will tell you that everything is! O) I# }5 y6 F4 e
probabilistic in nature, and so there is a probability that the drug in an0 a% W- S! ?4 p) o, e5 B) C7 G
athlete’s system could tunnel out right at the moment of the test. A slight
& ?0 {# r1 H4 `5 ]chance it may be, but should we disregard all test results because of it?
1 ^$ l+ Q* {; JLet’s be practical and reasonable, and accept that the World Anti-Doping
- u2 N" t+ u \! Iagency (WADA) is competent at its job. Ye’s urine sample will be stored for
6 n: P: O O! z; ?3 ]) F3 J+ N* Height years after the contest for future testing as technology advances.
# v! g, N7 q! _6 W6 C; nInnocent until proven guilty, shouldn’t it be?; D/ X0 J/ @& J7 J+ j' e5 i; K/ e
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Sixth, and the last point I would like to make, is that the out-of-
. M8 g4 u0 R- ]4 H, Tcompetition drug test is already in effect, which Callaway failed to mention
: Q) C# h7 y" t; _- b+ C& w. As noted in the president of WADA’s press release, drug testing for
9 E/ v* J* x# c& B' x2 yOlympians began at least six months before the opening of the London
6 A5 e9 y4 C% C. ^Olympics. Furthermore, 107 athletes have been banned from this Olympics for2 Z+ t. U6 @+ Q
doping. That may be the reason that “everyone will pass at the Olympic
+ u6 W5 Q9 |/ m2 i" C W5 r6 @games. Hardly anyone fails in competition testing” — those who did dope
. g6 A. r1 |" B8 Ohave already been caught and sanctioned. Callaway is free to suggest that a( a+ H1 `4 ^3 ]5 T
player could have doped beforehand and fooled the test at the game, but this- d2 e# @0 G" Y* P
possibility is certainly ruled out for Ye.
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" k/ r& _5 U* m. oOver all, even though Callaway did not falsify any data, he did (& S8 M( f# @) r. Y0 h4 Z
intentionally or not) cherry-pick data that, in my view, are far too# S w% {0 J! b" J9 E) k* n# I
suggestive to be fair and unbiased. If you want to cover a story of a7 i: k4 ~% A4 @+ c
suspected doping from a scientific point of view, be impartial and provide
# k9 ?- I9 F a, Z/ p- vall the facts for the reader to judge. You are entitled to your n) x7 U. y& Z6 [3 m+ t7 M
interpretation of the facts, and the expression thereof in your piece,
( _2 i' }; m/ R; qexplicitly or otherwise, but showing only evidence that favours your' ~2 }. a- I7 O$ I/ E5 I4 |. `9 I
argument is hardly good science or journalism. Such an article in a journal$ o; a" M1 Z2 Z$ U* n! h
such as Nature is not an appropriate example of how scientific research or
$ ?9 ?; _( u4 z% `reporting should be done. |
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