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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 JIANG3 K0 V5 h, A9 s( h0 h
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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) {. U6 e: C3 {6 s# T) qhttp://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html
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FROM LAI JIANG, Department of Chemistry, University of Pennsylvania6 c' g$ A# X: ?& g' [
, }2 W( b: ]: TIt is a shame to see Nature — which nearly all scientists, including myself: @& B' G' Y5 C% P7 Y& u
, regard as one of the most prestigious and influential physical-science0 C+ m7 Q3 c3 N, V& q
magazines — publish a thinly veiled biased article like this. Granted, this
3 r3 |. B* m% E9 pis not a peer-reviewed scientific article and did not go through the9 M8 l/ z" I) A# Q7 \' m
scrutiny of picking referees. But to serve as a channel for the general
* ]- \, c8 r$ C! z" V; ~populace to be in touch with and appreciate science, the authors and editors; A/ t2 s6 T/ k p/ H
should at least present the readers with facts within the proper context,
- v6 x4 ^& B' x( F4 }6 P4 hwhich they blatantly failed to do.
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# m7 |6 `4 n9 q4 D4 xFirst, to identify Ye’s performance increase, Ewen Callaway compared her
$ @7 F% T& y. EOlympic 400-metre IM time with her performance at the World Championships in" C3 x, O4 H: T4 z9 g
2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “
# o$ q6 l$ a9 tanomalous” improvement of around 7 seconds (6.72 s). In fact, her previous
1 r3 i: C( f1 n9 \0 Q. Ipersonal best was 4:33.79 at the Asian Games in 2010. This leads to an4 g9 R' l( x. }* E3 j# l5 w
improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the
/ H* d5 M2 `$ }/ Q! z/ sdifference between the gold and silver medal, I see no reason for 5.38 s to, u- r+ h' _) @' d2 i- c6 c
be treated as 7 s.
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& z0 p; g' t( @6 @& T" n# V* tSecond, as previously pointed out, Ye is only 16 years old and her body is
: E# Y& l2 [1 N8 `7 P- T1 o7 Vstill developing. Bettering oneself by 5 seconds over two years may seem, E, T. _. n; N4 r
impossible for an adult swimmer, but it certainly happens among youngsters.
) y* x' h1 Y$ F, |. zAn interview with Australian gold medallist Ian Thorpe revealed that his 4000 k1 ^# q% j9 V3 J* b
-metre freestyle time improved by 5 seconds between the ages of 15 and 16.1 u: ~# a" Q: n0 t" F
For regular people, including Callaway, it may be hard to imagine what an: P; X s( ~1 L; f$ X
elite swimmer can achieve as he or she matures and undergoes scientific and) z* E) j& ?( a z
persistent training. But jumping to the conclusion that it is “anomalous”) h8 P9 B9 f- N) C( i Y: x- d; m
based on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.8 L n0 V& Q+ @0 o
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Third, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook
& t' K2 Z. \+ N9 t- B4 ]- v6 Eexample of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in3 Z, b! ~1 o D' B
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so
* t& X- c% ~0 H: Hhe chose not to push himself too hard and to conserve his energy for later+ l7 g# ]" ^9 @0 O
events (whether this conforms to the Olympic spirit and the ‘use one’s2 K7 ?6 M/ Z/ {: U: k- m
best efforts to win a match’ requirement that the Badminton World2 T4 K4 t- {- ^9 {/ r- F
Federation recently invoked to disqualify four badminton pairs is another! o" b6 o" A& z8 [, k q# W
topic worth discussing, though probably not in Nature). Ye, on the other
7 ?+ `7 X0 Z* f/ j/ O) phand, was trailing behind after the first 300 metres and relied on freestyle
, V* y. P9 L# H$ P$ D$ M, in which she has an edge, to win the race. Failing to mention this
! Y# |1 t$ @( E' v! Wstrategic difference, as well as the fact that Lochte is 23.25 seconds1 j! R% x6 C, v& M# W B2 V
faster (4:05.18) than Ye overall, creates the illusion that a woman swam
8 z" b9 l% ^! |faster than the best man in the same sport, which sounds impossible. Putting
/ O+ U0 t( d# Q6 B |aside the gender argument, I believe this is still a leading question that
7 [% Y% \* t8 d4 w& T0 l/ \" eimplies to the reader that there is something fishy going on.
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1 j$ J, c1 _1 G7 xFourth is another example of cherry-picking. In the same event, there are, d; {/ @4 U q% E1 q" ?
four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93) e0 r& L7 J, X3 N3 C; P/ ^0 t% O& C
s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s
2 Q' l8 p- W L% u), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns
5 O& b) v/ Z6 d9 Q- Oout, if we are just talking about the last 50 metres in a 400-metre IM,) w# m5 g; L+ }; f+ d
Lochter is not the example I would have used if I were the author. What kind
+ b* e0 p9 i, K4 f) F: Kof scientific rigorousness is Callaway trying to demonstrate here? Is it
+ o+ ~+ |' s' H6 b. V* Elogical that if Lochter is the champion, we should assume that he leads in a, `1 p6 g, b X, L
every split? That would be a terrible way to teach the public how science
5 N+ Y6 T/ m, ]4 zworks." P. V( N2 s/ i+ e+ i4 s
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Fifth is the issue I oppose the most. Callaway quotes Ross Tucker and/ @, h: _2 O% ~7 a) w
implies that a drug test cannot rule out the possibility of doping. Is this0 k2 @* s4 }- i3 N3 Q! ]. q
kind of agnosticism what Nature really wants to teach its readers? By that, {% [8 Z% o* n4 w
standard, I estimate that at least half of the peer-reviewed scientific
' o* R6 q" `! n' gpapers in Nature should be retracted. How can one convince the editors and- i+ o3 k+ I" ~) ?$ Z
reviewers that their proposed theory works for every possible case? One
0 U; D0 [ V& p6 E4 O2 s; B. N' fcannot. One chooses to apply the theory to typical examples and to+ [8 L" v/ E" Y- e4 \5 m2 ^
demonstrate that in (hopefully) all scenarios considered, the theory works
( E9 M# i: h9 ?! _& _0 X. ato a degree, and that that should warrant publication until a counterexample2 [# j9 u$ ], _2 w. X) b
is found. I could imagine that Callaway has a sceptical mind, which is
" J& D) i' @+ h; p( qcrucial to scientific thinking, but that would be put to better use if he
# h: M. u) A" \: |9 M3 q% J( Rwrote a peer-reviewed paper that discussed the odds of Ye doping on a highly$ J/ h& A& S2 Y% N
advanced, non-detectable drug that the Chinese have come up with in the; I. E! Z# p6 f/ a. j8 ]) E
past 4 years (they obviously did not have it in Beijing, otherwise why not
( C6 J5 Z, O- c4 t1 Puse it and woo the audience at home?), based on data and rational derivation
' E" \' J, ^, K" ?3 r6 P. This article, however, can be interpreted as saying that all athletes are& K6 @: k; q: Q w7 q: S0 e
doping and the authorities are just not good enough to catch them. That may
# ?& c8 z6 T* P0 Ebe true, logically, but definitely will not make the case if there is ever a8 e7 z2 A) u7 k3 f7 P
hearing by the governing body for water sports, FINA, to determine if Ye6 P/ Q3 t0 M: S Z- Y6 N1 z
has doped. To ask whether it is possible to obtain a false negative in a
4 i4 e2 O& J) S- s0 y1 Y% qdrug test looks like a rigged question to me. Of course it is possible:
; Z1 C& i( ^: Y# Yother than the athlete taking a drug that the test is not designed to detect( o' C& c& [) _, H( l! \
, anyone who has taken quantum 101 will tell you that everything is
* U7 \8 \; N& t3 c; y) aprobabilistic in nature, and so there is a probability that the drug in an
* I# i- `" @* C; Tathlete’s system could tunnel out right at the moment of the test. A slight+ o; p* x- I9 y5 V- Z5 w Y
chance it may be, but should we disregard all test results because of it?
% z5 P3 z) r% U- J* v4 s+ S' q# ~/ QLet’s be practical and reasonable, and accept that the World Anti-Doping% m: E" X8 L/ e3 e. P( `
agency (WADA) is competent at its job. Ye’s urine sample will be stored for3 s: O! z% q7 h
eight years after the contest for future testing as technology advances.3 A2 @8 j. {; N9 c
Innocent until proven guilty, shouldn’t it be?% k' [$ b# k6 |/ m+ R6 ^6 l' W
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Sixth, and the last point I would like to make, is that the out-of-
- [8 v& \1 J+ `competition drug test is already in effect, which Callaway failed to mention
) I* }4 v; L* Z: Z# s1 `. As noted in the president of WADA’s press release, drug testing for* O8 V$ H9 l ?) q& d- ~1 j
Olympians began at least six months before the opening of the London5 `+ k) j% ~1 Z- e: r
Olympics. Furthermore, 107 athletes have been banned from this Olympics for4 t$ O: F B5 I2 o& ?+ Z( ^ ?! T; T
doping. That may be the reason that “everyone will pass at the Olympic
4 y, y" g/ s0 t0 t, z( B6 Wgames. Hardly anyone fails in competition testing” — those who did dope& K( P2 L$ X* y5 T
have already been caught and sanctioned. Callaway is free to suggest that a3 N; `/ k+ E W5 P* n: P% V0 P" R
player could have doped beforehand and fooled the test at the game, but this9 O! P& e% ]% u. ]! V
possibility is certainly ruled out for Ye.$ D; y; ]8 ~/ k. q4 s
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Over all, even though Callaway did not falsify any data, he did (! b1 F4 F& Y3 X- r% p# m
intentionally or not) cherry-pick data that, in my view, are far too+ p% R/ O7 L( X9 _
suggestive to be fair and unbiased. If you want to cover a story of a0 \0 Q: {5 J8 J3 w- L
suspected doping from a scientific point of view, be impartial and provide
8 }3 l1 d8 N) H6 m3 B( eall the facts for the reader to judge. You are entitled to your
. t9 ?6 J! {& S! ~4 c3 _9 [interpretation of the facts, and the expression thereof in your piece,
5 i' Z, H5 V; L C; n5 wexplicitly or otherwise, but showing only evidence that favours your
0 t: D$ \3 v3 U8 _( i8 M$ Rargument is hardly good science or journalism. Such an article in a journal
" v M; ~3 s/ ?$ Csuch as Nature is not an appropriate example of how scientific research or
7 R/ ?, S F% i1 _( d- Q8 y$ breporting should be done. |
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