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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. s0 G( V# O5 `. T! X! V1 L4 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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8 Q# M4 w; {( m% i3 r5 thttp://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html% Z3 c: y0 R; \: H6 @* n
9 `) r# A3 @, G9 D" n2 A8 f# x: T2 nFROM LAI JIANG, Department of Chemistry, University of Pennsylvania9 g$ _! x4 t1 S$ |
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It is a shame to see Nature — which nearly all scientists, including myself. [. \$ A @0 c# ]" O
, regard as one of the most prestigious and influential physical-science' H! d, f* I7 z* m( i
magazines — publish a thinly veiled biased article like this. Granted, this
/ B, Y x* n/ ]8 P w# O% Uis not a peer-reviewed scientific article and did not go through the
$ E# O o( ~6 e+ n' L0 f! i5 {scrutiny of picking referees. But to serve as a channel for the general
6 `# c6 U+ Q0 v2 S8 ~populace to be in touch with and appreciate science, the authors and editors% R0 X" p- I/ K* o+ C& U0 _7 x
should at least present the readers with facts within the proper context,
" M' J4 T- d3 [' Mwhich they blatantly failed to do.4 H, C/ D/ Q5 e' p4 `. `- Q
2 O( J+ N ?4 k, `0 n- @2 L" y% tFirst, to identify Ye’s performance increase, Ewen Callaway compared her' p! m" D! w/ B/ d m
Olympic 400-metre IM time with her performance at the World Championships in
2 P. R) n* b1 y3 c3 f0 ^9 b' D2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “
: j4 ~: G* E; m, l9 n$ Vanomalous” improvement of around 7 seconds (6.72 s). In fact, her previous. M7 ?' D1 B% }0 ]7 ?8 J
personal best was 4:33.79 at the Asian Games in 2010. This leads to an0 r8 F) m. B+ @$ @' p
improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the/ X1 W* p; {( @: N0 [0 ]( K
difference between the gold and silver medal, I see no reason for 5.38 s to8 F+ B% o" U. Y+ i" T
be treated as 7 s.
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Second, as previously pointed out, Ye is only 16 years old and her body is
- G, m0 Z# L6 P( ^! astill developing. Bettering oneself by 5 seconds over two years may seem* c& S7 i! o. c! m5 o W
impossible for an adult swimmer, but it certainly happens among youngsters.0 Z3 X1 R" n9 N5 g7 i0 K f
An interview with Australian gold medallist Ian Thorpe revealed that his 400
3 z( E2 Y8 k" x+ U4 K; ?4 t-metre freestyle time improved by 5 seconds between the ages of 15 and 16.
v$ P' j& A+ \For regular people, including Callaway, it may be hard to imagine what an9 R. x+ P8 E. z. W) s# u$ n# R: K' D
elite swimmer can achieve as he or she matures and undergoes scientific and* c7 I; O- ]6 g K0 D% e9 N
persistent training. But jumping to the conclusion that it is “anomalous”
4 ?8 e4 ]2 Q+ Cbased on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.4 Z, {& y t" a7 {
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Third, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook
, G# x. ]6 A, N# L9 @8 g5 F9 Aexample of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in) x( J3 W/ f4 _9 t9 m9 o1 z
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so
) c# Q# n' d l9 c% H) Bhe chose not to push himself too hard and to conserve his energy for later' U$ a. f' J7 A
events (whether this conforms to the Olympic spirit and the ‘use one’s+ P0 ~: U; X7 r1 L& T a
best efforts to win a match’ requirement that the Badminton World- {3 i2 t/ c; G7 }" g* p$ ~( |
Federation recently invoked to disqualify four badminton pairs is another
, q; u+ Z0 O: d5 utopic worth discussing, though probably not in Nature). Ye, on the other
, k4 l0 |+ ~+ J) W: h$ phand, was trailing behind after the first 300 metres and relied on freestyle
& \5 o$ g3 Y9 b; y; r4 q- G, in which she has an edge, to win the race. Failing to mention this3 y+ ?0 u( ]3 T* z
strategic difference, as well as the fact that Lochte is 23.25 seconds4 D Q3 @$ U4 s, o% ]
faster (4:05.18) than Ye overall, creates the illusion that a woman swam
' t- ?/ d4 F; ^$ E" o9 J. lfaster than the best man in the same sport, which sounds impossible. Putting
0 G" \4 z! v; {3 Naside the gender argument, I believe this is still a leading question that
' |2 v w* ?8 `8 T5 uimplies to the reader that there is something fishy going on.
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Fourth is another example of cherry-picking. In the same event, there are
/ N4 l. u. g& s6 Rfour male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93
7 r' f! |+ Q6 `$ O, ps) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s2 `+ ~5 f1 e# _1 L. T* w# w2 m2 j7 E
), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns
& v; X; ]# D1 J1 x9 h0 uout, if we are just talking about the last 50 metres in a 400-metre IM,, y7 ?" ~0 f' @2 t. O7 U6 K
Lochter is not the example I would have used if I were the author. What kind8 x/ \8 b3 |7 X
of scientific rigorousness is Callaway trying to demonstrate here? Is it; N' M/ b2 D5 K4 `9 u
logical that if Lochter is the champion, we should assume that he leads in
2 i9 k7 N8 _- Mevery split? That would be a terrible way to teach the public how science7 G; ?4 U' h3 P8 G6 C& s
works.
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Fifth is the issue I oppose the most. Callaway quotes Ross Tucker and
3 l. g; B; K" T8 v, v% O% C7 T! |implies that a drug test cannot rule out the possibility of doping. Is this9 w9 r5 X' C3 G% l
kind of agnosticism what Nature really wants to teach its readers? By that9 z0 ^, o& W7 A6 v
standard, I estimate that at least half of the peer-reviewed scientific
7 g6 n# Q* a' e: L( q# A4 k4 qpapers in Nature should be retracted. How can one convince the editors and
. J$ O* ]9 z* J, N; u n! `reviewers that their proposed theory works for every possible case? One) j! d. g# j- R; L
cannot. One chooses to apply the theory to typical examples and to# { C; O9 l- _' S n" n6 m3 b
demonstrate that in (hopefully) all scenarios considered, the theory works
1 A: d: m- Q9 x& Nto a degree, and that that should warrant publication until a counterexample
' x+ V1 U8 A" {is found. I could imagine that Callaway has a sceptical mind, which is
1 E5 `4 a/ _& qcrucial to scientific thinking, but that would be put to better use if he$ {8 I" B6 N9 q0 M! S: [) \* P8 ~, U
wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly
- u" f5 g$ G& u6 a1 }7 Vadvanced, non-detectable drug that the Chinese have come up with in the; k8 j4 o6 f% S! l5 Z f
past 4 years (they obviously did not have it in Beijing, otherwise why not; A7 f. ]* h% ~2 i! z$ L, E, E
use it and woo the audience at home?), based on data and rational derivation8 m' x& |# l, [5 N
. This article, however, can be interpreted as saying that all athletes are
5 @' d+ D: G+ V- G I8 }$ wdoping and the authorities are just not good enough to catch them. That may
' h) `, B3 W8 A2 ?be true, logically, but definitely will not make the case if there is ever a3 B7 ]% `2 \) C/ i0 I( K2 k
hearing by the governing body for water sports, FINA, to determine if Ye! }6 k4 F6 l: v" m; I/ z
has doped. To ask whether it is possible to obtain a false negative in a; B- C: v) u/ i. u! m
drug test looks like a rigged question to me. Of course it is possible:6 k, }( q F9 N( v; j' a# @) i9 ^6 t6 A
other than the athlete taking a drug that the test is not designed to detect! \. O. i; j3 F A1 S5 e9 q
, anyone who has taken quantum 101 will tell you that everything is. L( q. |, E7 P" V; U: _
probabilistic in nature, and so there is a probability that the drug in an
7 \3 I* ]+ k. S* Dathlete’s system could tunnel out right at the moment of the test. A slight* ?& P# X, g# ]4 @# K, q
chance it may be, but should we disregard all test results because of it?
D8 W7 E! o- `9 s6 ]0 ?Let’s be practical and reasonable, and accept that the World Anti-Doping
# U8 m6 K. V4 q/ E# P$ ?. nagency (WADA) is competent at its job. Ye’s urine sample will be stored for2 S% Y3 j( N- Y' E; X' C* I! \
eight years after the contest for future testing as technology advances.6 v8 o# N/ [ F$ C5 h: S8 M
Innocent until proven guilty, shouldn’t it be?: \; u3 Y& _, F; f& W7 X) m, C
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Sixth, and the last point I would like to make, is that the out-of-- a/ o3 h# }' @$ t1 L" \- d9 [
competition drug test is already in effect, which Callaway failed to mention: K8 J. K% Z5 q
. As noted in the president of WADA’s press release, drug testing for" S; u" C' \" h, ?: t; ?" ^' Q
Olympians began at least six months before the opening of the London
- ?! X9 v/ @0 J9 o: u3 _% k1 `Olympics. Furthermore, 107 athletes have been banned from this Olympics for
: C9 C8 P6 h9 y* I, Jdoping. That may be the reason that “everyone will pass at the Olympic
; n; I8 u! w0 @0 I$ ?. lgames. Hardly anyone fails in competition testing” — those who did dope
/ l- E i+ G% R6 u" zhave already been caught and sanctioned. Callaway is free to suggest that a
7 |$ g6 T/ D% j9 ]player could have doped beforehand and fooled the test at the game, but this
9 U* u) g, w M( V4 O' c, fpossibility is certainly ruled out for Ye.
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1 t; q9 j7 h0 ~( C& r9 m% c( NOver all, even though Callaway did not falsify any data, he did (: Z- ^6 X2 m5 P- d. D* ]
intentionally or not) cherry-pick data that, in my view, are far too: ]1 o+ m9 w4 x+ B
suggestive to be fair and unbiased. If you want to cover a story of a
- z! d+ Q* a& O0 e4 Q. B7 Z Qsuspected doping from a scientific point of view, be impartial and provide( G# ^. P' k0 I/ X. O
all the facts for the reader to judge. You are entitled to your' A9 W/ K l. j/ [: ]5 [
interpretation of the facts, and the expression thereof in your piece,
+ a+ V% w0 G9 e! K h$ i6 V2 _explicitly or otherwise, but showing only evidence that favours your
* \) ]6 `5 D* D0 eargument is hardly good science or journalism. Such an article in a journal& ], |7 [, u* G% M0 J/ v$ N
such as Nature is not an appropriate example of how scientific research or2 W; c8 v! a) X+ x; N& O4 u& D8 D
reporting should be done. |
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