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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" `/ `; C% v! j$ R
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: u: `3 Y" J$ x1 i
+ v3 d/ l# z( O% ?/ A- r6 hFROM LAI JIANG, Department of Chemistry, University of Pennsylvania* O) ^5 X5 K7 o" N
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It is a shame to see Nature — which nearly all scientists, including myself
) D; A9 K: B0 _, regard as one of the most prestigious and influential physical-science
+ V. Z) Q8 I4 E Q: D! Fmagazines — publish a thinly veiled biased article like this. Granted, this
` d2 k" w j6 ?is not a peer-reviewed scientific article and did not go through the
5 }! g1 J2 U' @$ u2 yscrutiny of picking referees. But to serve as a channel for the general: I1 L4 x0 v9 c4 ]) X$ d% y
populace to be in touch with and appreciate science, the authors and editors4 Z6 j( P4 N6 r ?; t5 U& Q
should at least present the readers with facts within the proper context,
1 e& p* B l! @3 z( h7 H4 L2 x" u4 G. Twhich they blatantly failed to do.
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First, to identify Ye’s performance increase, Ewen Callaway compared her
2 M, h' p: r8 H1 h# wOlympic 400-metre IM time with her performance at the World Championships in5 a/ Q/ u& G0 k/ W+ i3 ^, {
2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “4 v* o5 i" B" b: ]0 O( Z
anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous* U! d: K3 `4 L; ?
personal best was 4:33.79 at the Asian Games in 2010. This leads to an, [8 @" {1 x4 J6 I9 y
improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the+ Q. p( _) K' T Y- Z0 Y8 r2 ^
difference between the gold and silver medal, I see no reason for 5.38 s to0 r+ _8 ]; S8 G# }
be treated as 7 s.
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$ p0 I+ V) o- b5 `, i' `Second, as previously pointed out, Ye is only 16 years old and her body is
& R; B1 I& e1 n; J/ A4 @still developing. Bettering oneself by 5 seconds over two years may seem
' A9 z/ j! C) O6 F \impossible for an adult swimmer, but it certainly happens among youngsters.* V y9 Y+ Z$ q1 X; \- r4 t
An interview with Australian gold medallist Ian Thorpe revealed that his 400
& N( I" Z5 S f; H& r-metre freestyle time improved by 5 seconds between the ages of 15 and 16., e0 M6 w _& |9 P
For regular people, including Callaway, it may be hard to imagine what an6 P* V8 K5 B2 x7 g5 v
elite swimmer can achieve as he or she matures and undergoes scientific and
+ n$ z1 o. B; D4 \persistent training. But jumping to the conclusion that it is “anomalous”
0 k- _' D: |1 q, \based on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.5 m0 ]. C6 \4 M. @7 R0 x
8 `, I8 I& o4 [5 m9 T' JThird, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook
8 K3 p# Z0 t0 e, |0 f: ?. Cexample of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in
1 h \$ I. r) z3 x' z5 ythe last 50 metres, but Lochte had a huge lead in the first 300 metres, so) K2 A$ X; S6 [
he chose not to push himself too hard and to conserve his energy for later) N, ?- d" d6 A. E! y: x' z
events (whether this conforms to the Olympic spirit and the ‘use one’s+ `, a, f! W s' t7 N+ U
best efforts to win a match’ requirement that the Badminton World
2 E, f% |; N- ~+ V u# cFederation recently invoked to disqualify four badminton pairs is another' j$ f" m. z9 s8 X, W
topic worth discussing, though probably not in Nature). Ye, on the other/ E0 T9 X8 K9 v3 ^4 y
hand, was trailing behind after the first 300 metres and relied on freestyle
8 [: D& S. z% n( E9 x, in which she has an edge, to win the race. Failing to mention this
; y c+ O) c7 e$ Pstrategic difference, as well as the fact that Lochte is 23.25 seconds
8 G7 r& O1 U$ J4 r9 vfaster (4:05.18) than Ye overall, creates the illusion that a woman swam
: G/ Z, g4 x0 G9 }faster than the best man in the same sport, which sounds impossible. Putting' B& P8 Q% A7 d1 R E
aside the gender argument, I believe this is still a leading question that
+ P" }) X: ~# m8 k5 kimplies to the reader that there is something fishy going on.6 v, O# a6 }- i; X
: w/ y$ `6 x7 {) RFourth is another example of cherry-picking. In the same event, there are/ b% t! @$ Q3 _% |' y2 u
four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93
0 i/ A. b8 T% x2 v8 Y Os) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s! e0 R; N; b; ^* D1 Z$ Z7 c! f
), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns6 i0 m, F, w* N1 g9 E2 C
out, if we are just talking about the last 50 metres in a 400-metre IM,
. m3 Q6 t W% E: H4 KLochter is not the example I would have used if I were the author. What kind }0 F8 f; V! I' @ N
of scientific rigorousness is Callaway trying to demonstrate here? Is it
$ @% p9 Y( p1 Nlogical that if Lochter is the champion, we should assume that he leads in
! T, D: \0 S8 s) q5 D9 C2 kevery split? That would be a terrible way to teach the public how science2 @4 }" p" p8 ~
works.
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C* N. T, ~7 S6 eFifth is the issue I oppose the most. Callaway quotes Ross Tucker and9 o8 ?0 M; K" l/ T
implies that a drug test cannot rule out the possibility of doping. Is this
6 L' l8 k3 R7 W& Okind of agnosticism what Nature really wants to teach its readers? By that
; I' W, ^0 }1 F' w3 nstandard, I estimate that at least half of the peer-reviewed scientific
! d3 {9 B* |6 z- [; B N8 a/ f3 e; Qpapers in Nature should be retracted. How can one convince the editors and, e4 p1 L% k! S) ]$ E
reviewers that their proposed theory works for every possible case? One
) |, l/ r+ x- [6 Y, T' ]cannot. One chooses to apply the theory to typical examples and to# p9 P4 m; K* t
demonstrate that in (hopefully) all scenarios considered, the theory works
1 @; D$ E& ~/ Z" _0 ~8 k5 sto a degree, and that that should warrant publication until a counterexample( |) L( k7 K5 n. T5 A$ V
is found. I could imagine that Callaway has a sceptical mind, which is' W2 w) N1 z$ C P3 f7 w4 {$ I
crucial to scientific thinking, but that would be put to better use if he& N/ A1 J7 N( U6 @1 M/ {! B" Q
wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly
- o/ W3 j: c% V8 N J8 _) P) ladvanced, non-detectable drug that the Chinese have come up with in the- G) x2 ~, G, c! `9 M1 q
past 4 years (they obviously did not have it in Beijing, otherwise why not0 j; ~5 o" ]* L' K3 S# v7 U7 |
use it and woo the audience at home?), based on data and rational derivation
0 o2 ^- f7 P* A& v( r0 M! P5 Y0 Y. This article, however, can be interpreted as saying that all athletes are
, Q5 v* J; Q2 J% r1 xdoping and the authorities are just not good enough to catch them. That may3 i9 U/ P0 c4 B1 W' w$ n1 ]( @' \7 ?' a
be true, logically, but definitely will not make the case if there is ever a
9 A* G4 Y; {- d1 ihearing by the governing body for water sports, FINA, to determine if Ye
$ Q0 {- M7 I; [5 s7 C' zhas doped. To ask whether it is possible to obtain a false negative in a
/ a; B4 C/ }( h' \" g6 w7 udrug test looks like a rigged question to me. Of course it is possible:* w" M9 K2 Q* [7 U3 x" r
other than the athlete taking a drug that the test is not designed to detect
: g3 P' Q8 u, `' G2 K) @, F, anyone who has taken quantum 101 will tell you that everything is
1 w1 N) M3 ~, b' t a* ~7 Jprobabilistic in nature, and so there is a probability that the drug in an
6 W! E3 D6 d8 f% B% t9 i+ U$ Rathlete’s system could tunnel out right at the moment of the test. A slight
" v; f9 F @ D7 ]% Dchance it may be, but should we disregard all test results because of it?1 {5 W3 ^# q. P6 |3 v
Let’s be practical and reasonable, and accept that the World Anti-Doping
* Y. }4 M4 V$ B) \. j$ lagency (WADA) is competent at its job. Ye’s urine sample will be stored for
V5 q j$ s$ Xeight years after the contest for future testing as technology advances.% K( K# }* s1 N! U
Innocent until proven guilty, shouldn’t it be?
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0 [9 S4 f6 z- k v' \2 F7 iSixth, and the last point I would like to make, is that the out-of-+ r, ]+ U8 c$ X& i0 `0 W' `
competition drug test is already in effect, which Callaway failed to mention& ?- T8 `9 L- ~: J6 `) d
. As noted in the president of WADA’s press release, drug testing for
8 c( `! k! B, j$ \ O. R" `Olympians began at least six months before the opening of the London
: D0 e @8 ~7 ROlympics. Furthermore, 107 athletes have been banned from this Olympics for$ Y3 ]2 V3 ]; `, G2 C' s
doping. That may be the reason that “everyone will pass at the Olympic+ _) P5 x0 ~; {6 q+ T
games. Hardly anyone fails in competition testing” — those who did dope$ X+ ?( {% e" G9 Z( u: E. a0 f8 b
have already been caught and sanctioned. Callaway is free to suggest that a
6 L N; ~; H6 T6 [player could have doped beforehand and fooled the test at the game, but this9 u5 H; S: l2 P- h. ^1 I) h
possibility is certainly ruled out for Ye.
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Over all, even though Callaway did not falsify any data, he did (& g/ Z% o, }7 P5 G6 ~
intentionally or not) cherry-pick data that, in my view, are far too; \" q( F( F% ]! k$ Y) Y& T
suggestive to be fair and unbiased. If you want to cover a story of a0 O! X) I9 O A' j8 @: `; m1 l
suspected doping from a scientific point of view, be impartial and provide' {4 f" F/ X4 L+ S U
all the facts for the reader to judge. You are entitled to your
8 ~. [0 C* G# y# Jinterpretation of the facts, and the expression thereof in your piece,
5 R( x3 K& L N) rexplicitly or otherwise, but showing only evidence that favours your6 K9 N: ?, b1 C P4 B) ^5 r- `
argument is hardly good science or journalism. Such an article in a journal3 z5 Y! |5 V/ I+ z5 Z" P
such as Nature is not an appropriate example of how scientific research or* y3 I8 e' I& p, s2 i% V/ u' |7 F2 W, N
reporting should be done. |
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