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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. l% n& F9 F; m% Z" {; y& E- M
如果是中国长大的,英语能到这种程度真是很不简单。" v8 @5 r8 q; C# K4 P) g
- O* \+ g8 r1 Bhttp://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html s- {0 q0 I& t/ o
K& x3 C$ J8 E/ ] v6 l3 X. w+ EFROM LAI JIANG, Department of Chemistry, University of Pennsylvania7 O' A L# j/ w" j6 p" V: K0 N
2 q7 { N+ M# y" q' UIt is a shame to see Nature — which nearly all scientists, including myself
4 X. r3 a+ Q6 y9 }, regard as one of the most prestigious and influential physical-science/ i& C& s( Q* t, H6 O, b/ b
magazines — publish a thinly veiled biased article like this. Granted, this
9 \8 }* @& L7 G! [+ tis not a peer-reviewed scientific article and did not go through the+ {# B+ D" y5 `4 i8 {
scrutiny of picking referees. But to serve as a channel for the general" w# |( Y) ?' I4 U) C; v8 I4 }2 u
populace to be in touch with and appreciate science, the authors and editors
4 v5 ~, L# s/ t6 F5 o) f& I2 jshould at least present the readers with facts within the proper context,
+ J4 f3 W* r5 awhich they blatantly failed to do.7 ?" R9 ]1 }- Z& U- g& D6 Q( z; P/ I
- m7 i" g+ U' t6 Q7 pFirst, to identify Ye’s performance increase, Ewen Callaway compared her
6 h! t0 R8 i$ tOlympic 400-metre IM time with her performance at the World Championships in8 X1 }; s# z' H' @5 n, E
2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “
6 ^+ x8 {& N, H# U& |9 V0 @anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous! P! J1 K% W0 G' J
personal best was 4:33.79 at the Asian Games in 2010. This leads to an
( \0 T2 ?8 _/ H. m, Z* N0 Uimprovement of 5.38 seconds. In a sporting event in which 0.1 s can be the/ S/ z# M" P1 ? g1 W/ Y7 a
difference between the gold and silver medal, I see no reason for 5.38 s to
# s [7 G: J- K5 Fbe treated as 7 s.$ H8 J# a# J- s) j) @
, u0 v$ t9 U6 e& w' jSecond, as previously pointed out, Ye is only 16 years old and her body is
3 G5 y: E ~' E* J! I3 zstill developing. Bettering oneself by 5 seconds over two years may seem
+ {2 z9 |( a6 Z& e2 R# L# `impossible for an adult swimmer, but it certainly happens among youngsters.
+ U' p1 y, w$ \1 RAn interview with Australian gold medallist Ian Thorpe revealed that his 400, L5 ^8 @+ I- d
-metre freestyle time improved by 5 seconds between the ages of 15 and 16.7 Q, M% n8 l; N% r( y
For regular people, including Callaway, it may be hard to imagine what an
+ |. }9 s$ y B+ F, P! [/ @9 p( [) Yelite swimmer can achieve as he or she matures and undergoes scientific and' K( m" L; _ `) h
persistent training. But jumping to the conclusion that it is “anomalous”
$ Z6 }4 @, t/ t/ h5 Z) Dbased on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.7 u" S O/ y. g; X' k7 P, v
' q# Q8 T5 C+ n& g! w- H
Third, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook8 k O& V" G: W% t0 X+ \9 r
example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in
# @: Q' e+ K( [+ z# ^the last 50 metres, but Lochte had a huge lead in the first 300 metres, so& n- V) C- M* p% Y4 }
he chose not to push himself too hard and to conserve his energy for later. z7 R! w" l, z3 P# D1 }
events (whether this conforms to the Olympic spirit and the ‘use one’s. W9 {3 _4 R5 |/ o1 C0 i
best efforts to win a match’ requirement that the Badminton World9 g% e' g" R$ L! v6 q- O# q
Federation recently invoked to disqualify four badminton pairs is another
0 b8 \% o: [' g; A# {( w8 }' jtopic worth discussing, though probably not in Nature). Ye, on the other7 Q, W: I0 Y- @. { c+ z/ ?
hand, was trailing behind after the first 300 metres and relied on freestyle' W/ s0 C/ f# I- n1 k, ~
, in which she has an edge, to win the race. Failing to mention this6 y6 r8 J( d9 ?- L/ g9 F7 }& D3 q9 F
strategic difference, as well as the fact that Lochte is 23.25 seconds2 H: w( d! Z" _2 z9 F: o, c
faster (4:05.18) than Ye overall, creates the illusion that a woman swam
# V& W6 @$ z( I8 t& Rfaster than the best man in the same sport, which sounds impossible. Putting
3 M$ W: U. R! W, {5 D! ~( laside the gender argument, I believe this is still a leading question that- q' c) o0 o6 r) |
implies to the reader that there is something fishy going on.
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# g4 E) R, Q/ S/ q% Y( R; l7 ?2 KFourth is another example of cherry-picking. In the same event, there are, n0 o, |: L8 S. u% i1 [: t7 S
four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93
0 V& R4 ^0 ` w0 [# f! C9 z7 ss) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s
/ X1 l p. H7 C( o5 ^1 ?8 z), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns" Q! ^3 R" |* U+ p
out, if we are just talking about the last 50 metres in a 400-metre IM,9 Z3 v3 d# l* M# L5 f, F6 M/ A- g/ Z
Lochter is not the example I would have used if I were the author. What kind
; t y4 s, N; F6 q9 lof scientific rigorousness is Callaway trying to demonstrate here? Is it
6 s1 \7 g5 }9 Ological that if Lochter is the champion, we should assume that he leads in9 f1 |& s6 B" ]5 w# V' J0 M# v
every split? That would be a terrible way to teach the public how science
5 L: h7 T, ?1 O) {- j* qworks.' ?: q r, d+ j' R0 u
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Fifth is the issue I oppose the most. Callaway quotes Ross Tucker and
* N6 ^, {8 w. T% ?6 W M1 H( Rimplies that a drug test cannot rule out the possibility of doping. Is this2 l- U" E- Z, w3 o! }2 O% v, D1 t
kind of agnosticism what Nature really wants to teach its readers? By that1 s) F k1 Q8 s! @! ^- I
standard, I estimate that at least half of the peer-reviewed scientific+ Z- z3 C' i) Y! t' J }
papers in Nature should be retracted. How can one convince the editors and
/ M1 ^0 o) |- M; k4 m5 zreviewers that their proposed theory works for every possible case? One4 v8 ] a4 e! {4 C
cannot. One chooses to apply the theory to typical examples and to
' X- w* Q! n7 A) k, \demonstrate that in (hopefully) all scenarios considered, the theory works
# r% L6 _' z( ^/ i0 L2 z! Gto a degree, and that that should warrant publication until a counterexample
- E+ v* V8 S. Fis found. I could imagine that Callaway has a sceptical mind, which is: d. l# ?$ s; D4 P d& d, r
crucial to scientific thinking, but that would be put to better use if he
& Q4 K, g6 _9 ] Y# }wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly
5 i3 N* `/ `7 I! A7 S8 oadvanced, non-detectable drug that the Chinese have come up with in the/ c& y; h: f+ [; k3 I
past 4 years (they obviously did not have it in Beijing, otherwise why not+ ^+ C' `: E4 r+ K- k$ n( L
use it and woo the audience at home?), based on data and rational derivation
, R8 O2 w+ v& s- r& Y! m. This article, however, can be interpreted as saying that all athletes are
* V1 f$ A3 N9 vdoping and the authorities are just not good enough to catch them. That may' b4 A0 L- A4 i( G1 B
be true, logically, but definitely will not make the case if there is ever a
8 w1 A9 P. ]8 s# X/ m; }: Ihearing by the governing body for water sports, FINA, to determine if Ye' q; G3 O1 v1 a
has doped. To ask whether it is possible to obtain a false negative in a
% C$ ]# D" c* {8 U4 Z; |$ L4 }drug test looks like a rigged question to me. Of course it is possible:
' T, r# E/ h! G) {7 b1 r1 Uother than the athlete taking a drug that the test is not designed to detect' @& N" Y, Y g
, anyone who has taken quantum 101 will tell you that everything is
, }. W' g5 O) V1 r4 Q" a9 J8 F* Y! cprobabilistic in nature, and so there is a probability that the drug in an9 ?. D% x& w# x
athlete’s system could tunnel out right at the moment of the test. A slight
* Y( c8 c) a9 e3 K6 Q/ I# Ychance it may be, but should we disregard all test results because of it?
; U- ~" K- H' m8 i* }9 [8 l, J6 |Let’s be practical and reasonable, and accept that the World Anti-Doping
; u' y0 }7 d/ C' S# Oagency (WADA) is competent at its job. Ye’s urine sample will be stored for
% v9 Z: d$ X4 |& Aeight years after the contest for future testing as technology advances.
E# K1 y/ m7 d3 C7 a" ~Innocent until proven guilty, shouldn’t it be?* z' r/ [9 ^% K8 D C2 t8 ~
r. ~# e8 t6 m1 E4 {! b* e
Sixth, and the last point I would like to make, is that the out-of-' }& }4 K. E: D7 `1 l& v
competition drug test is already in effect, which Callaway failed to mention$ C8 { Q; O1 n5 x# U$ Z/ ^
. As noted in the president of WADA’s press release, drug testing for+ c2 U, q) h! d
Olympians began at least six months before the opening of the London
% u. Y" Z; U- [4 lOlympics. Furthermore, 107 athletes have been banned from this Olympics for
* X7 T L( I" j* B4 s1 u% jdoping. That may be the reason that “everyone will pass at the Olympic
3 o1 M+ I0 R$ w T4 Ugames. Hardly anyone fails in competition testing” — those who did dope5 Y$ Q& g7 { o! Z( Q
have already been caught and sanctioned. Callaway is free to suggest that a
6 J( j6 R M( v$ W* Dplayer could have doped beforehand and fooled the test at the game, but this
0 K/ `% E& s' a$ Y* i1 r9 Epossibility is certainly ruled out for Ye.
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Over all, even though Callaway did not falsify any data, he did (
% t2 s! p; J) D2 w8 q- C/ Eintentionally or not) cherry-pick data that, in my view, are far too) y6 H! j( H# d" q2 X. l7 U7 ^4 g, f
suggestive to be fair and unbiased. If you want to cover a story of a3 x- n/ m3 O" T: K" m# w
suspected doping from a scientific point of view, be impartial and provide
8 ^2 I; m1 o0 H* [all the facts for the reader to judge. You are entitled to your
3 `9 R6 k0 ?5 R$ Dinterpretation of the facts, and the expression thereof in your piece,5 i: Z* Z' \; ]- ?' L& i1 f
explicitly or otherwise, but showing only evidence that favours your& y. P' ^( V K) K
argument is hardly good science or journalism. Such an article in a journal- T( o; u0 j" b3 C' u& P* j% @9 T
such as Nature is not an appropriate example of how scientific research or
& ^$ T& f ^$ A* V; ]. L' `( _& V" ~reporting should be done. |
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