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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
* T0 w. m" Y: f$ B2 J' E! x4 n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& C r+ O8 v0 `( G. c, p
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FROM LAI JIANG, Department of Chemistry, University of Pennsylvania, x+ H1 Q8 e0 v2 {- H! V! r6 F
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It is a shame to see Nature — which nearly all scientists, including myself
5 i7 g9 L6 B1 M- v, regard as one of the most prestigious and influential physical-science
$ b1 u5 Y4 v+ T, A' hmagazines — publish a thinly veiled biased article like this. Granted, this5 {, l( ?& \8 ]& }6 ]
is not a peer-reviewed scientific article and did not go through the* M5 R6 M3 _, r( I+ x
scrutiny of picking referees. But to serve as a channel for the general3 W* _3 a: f/ E6 P
populace to be in touch with and appreciate science, the authors and editors' F8 R0 u# V: R- ^
should at least present the readers with facts within the proper context,! z: p2 M6 X+ m
which they blatantly failed to do.7 c3 j1 D1 E* G2 I6 X1 r/ P/ L5 {& M
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First, to identify Ye’s performance increase, Ewen Callaway compared her
! _1 R4 F; Q4 Y" L) _8 F0 HOlympic 400-metre IM time with her performance at the World Championships in1 j6 i+ v/ O* `* u& u8 u: Z- A4 o
2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “
* \, w. i# H! E4 sanomalous” improvement of around 7 seconds (6.72 s). In fact, her previous1 O! T- e3 k, B# w
personal best was 4:33.79 at the Asian Games in 2010. This leads to an
6 U5 Z0 J* u# b+ g) w: n6 \6 |improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the
\; t1 _" l" ^3 R' wdifference between the gold and silver medal, I see no reason for 5.38 s to
0 p# V& \2 E& r7 H' U& |be treated as 7 s., W$ c; L. f4 A. D l
% X0 Q v$ W. X n& D4 FSecond, as previously pointed out, Ye is only 16 years old and her body is
7 b. b( I/ J3 s; v5 p9 Hstill developing. Bettering oneself by 5 seconds over two years may seem
( L$ l6 i) e- H( Jimpossible for an adult swimmer, but it certainly happens among youngsters.; u/ j4 N; S. M5 k% e" h& J
An interview with Australian gold medallist Ian Thorpe revealed that his 400% ?9 K, e8 Q9 B5 Z" G9 X
-metre freestyle time improved by 5 seconds between the ages of 15 and 16.7 b: M2 Q; ~2 D! j3 G. ~4 r
For regular people, including Callaway, it may be hard to imagine what an6 ]" r, [8 R6 T4 {& h4 B! q
elite swimmer can achieve as he or she matures and undergoes scientific and
+ X5 k; D2 \1 ~4 {. s! G2 apersistent training. But jumping to the conclusion that it is “anomalous”
/ W. ?/ j4 X; Kbased on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.
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6 g6 P* }$ U2 S! H& b4 F- nThird, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook5 Z8 i4 B* ~2 ]2 m" `$ O+ H
example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in
/ s9 q( n& P2 r7 r1 o7 T f( Q/ Zthe last 50 metres, but Lochte had a huge lead in the first 300 metres, so: n2 ~) K9 o4 T. {9 {$ g0 F y4 ]
he chose not to push himself too hard and to conserve his energy for later
; X6 h, j1 X' T0 G! _+ Y' u+ `events (whether this conforms to the Olympic spirit and the ‘use one’s
- P, y' r; k( V- D! G& Lbest efforts to win a match’ requirement that the Badminton World! l* q# o% ?' k5 } m% E
Federation recently invoked to disqualify four badminton pairs is another
! H' C7 S+ J9 p Xtopic worth discussing, though probably not in Nature). Ye, on the other, [( @5 j+ `) z$ i; {6 X. g8 W3 d
hand, was trailing behind after the first 300 metres and relied on freestyle
( I' `6 F) [9 ^5 O* l, in which she has an edge, to win the race. Failing to mention this
$ }. \! M" q; h! ?6 t- Y$ wstrategic difference, as well as the fact that Lochte is 23.25 seconds7 [8 S1 b) l* x% K
faster (4:05.18) than Ye overall, creates the illusion that a woman swam
% \; v+ Q1 X. v4 T+ k6 Wfaster than the best man in the same sport, which sounds impossible. Putting% S) J4 G' X: y* C9 g% N
aside the gender argument, I believe this is still a leading question that6 f8 K2 a9 c: T" Z( V
implies to the reader that there is something fishy going on.
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# i1 M, C, M: fFourth is another example of cherry-picking. In the same event, there are' B+ i$ q9 g5 j6 H
four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93
$ ?9 M+ z5 @' [( Bs) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s- N9 h! }, u! J& r( H- d
), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns
+ Z5 }0 p2 \+ {. Tout, if we are just talking about the last 50 metres in a 400-metre IM,: S1 _ Q$ ?7 `% G- @" D: A4 @
Lochter is not the example I would have used if I were the author. What kind% j# V2 K" Y, U/ p4 F' w
of scientific rigorousness is Callaway trying to demonstrate here? Is it
9 Z/ P( E; R$ M# Z- I8 Plogical that if Lochter is the champion, we should assume that he leads in. t) p% U" }/ J# j1 i0 M' t' L
every split? That would be a terrible way to teach the public how science
4 w& ^# j4 [# B- P* |/ p! qworks.
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: V. n4 [7 C& T) F: wFifth is the issue I oppose the most. Callaway quotes Ross Tucker and- k2 P" V5 q4 a3 A0 F6 z( W; R& F2 I
implies that a drug test cannot rule out the possibility of doping. Is this
- d. |) U9 Z4 d4 F2 p; `kind of agnosticism what Nature really wants to teach its readers? By that' X8 K: S: }4 u: c+ e, @( A; I; G( K
standard, I estimate that at least half of the peer-reviewed scientific
! r; S: d$ c' H/ x: b* ?& npapers in Nature should be retracted. How can one convince the editors and4 J6 H) b" @& Y& q4 M2 {
reviewers that their proposed theory works for every possible case? One
; j) h9 a- E7 w8 u" f2 Acannot. One chooses to apply the theory to typical examples and to
9 e# @4 a# t; b9 N6 s' ~demonstrate that in (hopefully) all scenarios considered, the theory works! Q1 ?+ b( N K% g3 ^3 @
to a degree, and that that should warrant publication until a counterexample
: u$ \" n* B5 n( D4 G6 Y1 eis found. I could imagine that Callaway has a sceptical mind, which is
( v5 U1 M+ t5 \: A0 }" V/ tcrucial to scientific thinking, but that would be put to better use if he
0 a6 w" A/ o* V, gwrote a peer-reviewed paper that discussed the odds of Ye doping on a highly+ Q' q/ _- L% M W5 }/ ~
advanced, non-detectable drug that the Chinese have come up with in the7 F6 s1 J X5 ]3 E; r% B- l1 D
past 4 years (they obviously did not have it in Beijing, otherwise why not
# u; x# F* o- a. e6 N* Duse it and woo the audience at home?), based on data and rational derivation& s6 L" K& W4 ]. U" F& A" D
. This article, however, can be interpreted as saying that all athletes are: z- b. t# W9 W! {* { b
doping and the authorities are just not good enough to catch them. That may+ t) p4 ]8 o6 y$ c
be true, logically, but definitely will not make the case if there is ever a+ _' ], q! @1 A( r6 u& K& }
hearing by the governing body for water sports, FINA, to determine if Ye
7 r2 i1 _( I- n" p& S0 phas doped. To ask whether it is possible to obtain a false negative in a, A3 a9 W, }, X( |+ G( j7 a
drug test looks like a rigged question to me. Of course it is possible:
2 G* H. K8 }* D& v$ ?5 Eother than the athlete taking a drug that the test is not designed to detect# m# E& P) C) r' k8 K& L+ r
, anyone who has taken quantum 101 will tell you that everything is3 ], W+ d T1 n# f1 ?
probabilistic in nature, and so there is a probability that the drug in an/ D9 J6 }. i5 f: c6 j7 p, t" |! `6 v
athlete’s system could tunnel out right at the moment of the test. A slight
5 ^/ I Y9 {( a5 V9 Uchance it may be, but should we disregard all test results because of it?$ _% P4 v, W: I* }; ~3 `5 P
Let’s be practical and reasonable, and accept that the World Anti-Doping
2 }/ t1 ]9 d' `0 U5 x/ Y) Qagency (WADA) is competent at its job. Ye’s urine sample will be stored for
7 g4 o- \- @9 M% ?/ eeight years after the contest for future testing as technology advances.# g* d% y0 _# y9 }
Innocent until proven guilty, shouldn’t it be?6 l! i2 m. @7 @3 w
7 D7 \9 A# I0 h$ ?* K) d* M, `Sixth, and the last point I would like to make, is that the out-of-, A8 T) p2 e$ `. h) W9 a
competition drug test is already in effect, which Callaway failed to mention
; q4 S* u6 p5 L( f( }$ c1 g( N. As noted in the president of WADA’s press release, drug testing for
/ X3 b5 `1 N1 q6 a* S5 VOlympians began at least six months before the opening of the London7 E- s2 F0 E, I/ a8 s6 J$ q+ W) _# u
Olympics. Furthermore, 107 athletes have been banned from this Olympics for' K$ H! h9 E" Q& L$ ^' G/ S
doping. That may be the reason that “everyone will pass at the Olympic& u/ {3 m! K& x- [0 p
games. Hardly anyone fails in competition testing” — those who did dope' E; N. {" z& B `1 n7 T0 w& ?
have already been caught and sanctioned. Callaway is free to suggest that a
s9 Q" Z6 E2 _$ `) Qplayer could have doped beforehand and fooled the test at the game, but this, x a- G2 k$ v$ r, z P8 E9 o
possibility is certainly ruled out for Ye. S/ [* R3 N8 H7 Z0 V$ y# Y
1 `9 ]7 v8 ~; H+ ~Over all, even though Callaway did not falsify any data, he did (
$ E8 r3 j1 P {* w' N/ Kintentionally or not) cherry-pick data that, in my view, are far too
: a% s1 G L) y3 Csuggestive to be fair and unbiased. If you want to cover a story of a1 l0 ^$ P3 g% @
suspected doping from a scientific point of view, be impartial and provide
. H1 Y- s4 B) X0 Iall the facts for the reader to judge. You are entitled to your. W) k; t9 B! g
interpretation of the facts, and the expression thereof in your piece,+ v$ E# t) U4 J, V! Q+ c$ _( h
explicitly or otherwise, but showing only evidence that favours your
5 i# j) Q. A5 H0 h9 H" ]# F! Yargument is hardly good science or journalism. Such an article in a journal; d5 ]* X k8 d8 U% _0 o" }4 r- k
such as Nature is not an appropriate example of how scientific research or" ?* Q* T1 f+ y# ]
reporting should be done. |
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