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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
! V7 L% l0 k& ^- _ d6 f如果是中国长大的,英语能到这种程度真是很不简单。2 e2 v8 s1 m% T6 a
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http://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html
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% F6 F& H( m: G: `FROM LAI JIANG, Department of Chemistry, University of Pennsylvania% \, o0 e! f4 A' M) T# J
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It is a shame to see Nature — which nearly all scientists, including myself
9 Y% b: e: H6 B, regard as one of the most prestigious and influential physical-science
# I. J* ?; B r( J5 _% l- W4 l5 `magazines — publish a thinly veiled biased article like this. Granted, this. ~. L0 L6 J1 m
is not a peer-reviewed scientific article and did not go through the# V& e" [3 b z1 h
scrutiny of picking referees. But to serve as a channel for the general0 [2 V# P' @2 d8 ~
populace to be in touch with and appreciate science, the authors and editors
# L* ?' @- W1 y% n' \should at least present the readers with facts within the proper context,
/ v6 V2 o# k/ T' k7 {; _which they blatantly failed to do.
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First, to identify Ye’s performance increase, Ewen Callaway compared her: ~. ^: W+ Z' Y/ u3 M+ V% K) [9 Z
Olympic 400-metre IM time with her performance at the World Championships in
! c$ L; I$ m x2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “
" q r1 [6 {" }. kanomalous” improvement of around 7 seconds (6.72 s). In fact, her previous
( w4 ~/ ~( \, `9 [personal best was 4:33.79 at the Asian Games in 2010. This leads to an
$ k4 [, @% w" k7 Z2 ]4 s) T# Iimprovement of 5.38 seconds. In a sporting event in which 0.1 s can be the2 U! g1 E6 J- c( e* ^# W% g. m6 d0 ^0 D
difference between the gold and silver medal, I see no reason for 5.38 s to, r( ~1 |! N8 ~* l4 Q. V/ e
be treated as 7 s.
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Second, as previously pointed out, Ye is only 16 years old and her body is
# I' o- G) s7 J9 ^$ Q! ^& ustill developing. Bettering oneself by 5 seconds over two years may seem# k' l: J: {) v+ r/ Q
impossible for an adult swimmer, but it certainly happens among youngsters." F; B1 Q; W2 _7 \
An interview with Australian gold medallist Ian Thorpe revealed that his 400' }. k* p3 I" N+ f2 ~( [+ H8 W
-metre freestyle time improved by 5 seconds between the ages of 15 and 16.
& R# h; g8 a3 l& s5 t0 ?% `For regular people, including Callaway, it may be hard to imagine what an* W" y( g) O/ b# L" S% k
elite swimmer can achieve as he or she matures and undergoes scientific and
& \3 m3 [8 x1 f ]1 ?persistent training. But jumping to the conclusion that it is “anomalous”% L0 g n# w }* u* ~, \, _1 c
based on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.
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Third, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook
$ G. ]0 h3 E8 ^- u# Q. U0 b+ Fexample of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in8 i; f% E, P- Y4 K9 T8 ]
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so
) k2 N+ H! q% `3 w4 nhe chose not to push himself too hard and to conserve his energy for later* E+ H+ w" E; |& Q: r8 ]& e
events (whether this conforms to the Olympic spirit and the ‘use one’s
6 W+ M0 G1 P+ |: ~, f5 e" t( \best efforts to win a match’ requirement that the Badminton World/ U1 I2 v! X6 y* ?, x
Federation recently invoked to disqualify four badminton pairs is another! R9 |/ B. J- o* R
topic worth discussing, though probably not in Nature). Ye, on the other0 P5 b' t4 E$ l0 c; ]) u
hand, was trailing behind after the first 300 metres and relied on freestyle
* ?" W6 T& c6 q$ w4 S2 X, in which she has an edge, to win the race. Failing to mention this2 ?% K. i8 F9 D2 l( h3 ~6 L
strategic difference, as well as the fact that Lochte is 23.25 seconds4 ]% m$ ]0 H& t5 C# X5 |
faster (4:05.18) than Ye overall, creates the illusion that a woman swam) T) E# {" m y- U' p; d$ l4 l
faster than the best man in the same sport, which sounds impossible. Putting) T) W9 Q; X# h
aside the gender argument, I believe this is still a leading question that
) B. j. w1 i& L& b' Q% 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
5 O; A& P& X! z. H+ H; E! o. z+ Qfour male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93! M( R/ \! a4 D& a% E0 T2 U+ _
s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s
, ]1 Y# P! P% a, ~ ^+ i0 ~), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns2 y* o8 z0 \& d/ P
out, if we are just talking about the last 50 metres in a 400-metre IM,
6 n4 _% d4 \! p. GLochter is not the example I would have used if I were the author. What kind+ s3 W D$ N+ |+ k" n
of scientific rigorousness is Callaway trying to demonstrate here? Is it) z7 h1 r) y- c4 c; D
logical that if Lochter is the champion, we should assume that he leads in, `4 v6 ^5 S; K& U+ {
every split? That would be a terrible way to teach the public how science) V2 t+ B1 r6 m7 m# s- W
works." {' |& `& Z) J2 ^3 D/ M
( U: O9 o, A, V4 l, o9 _) Q iFifth is the issue I oppose the most. Callaway quotes Ross Tucker and
$ L2 X" v1 n7 [% Aimplies that a drug test cannot rule out the possibility of doping. Is this
$ i, g6 _$ q. G1 d2 X# ^6 @3 M' l" m3 fkind of agnosticism what Nature really wants to teach its readers? By that7 C/ w3 m/ G9 [; c# @+ | s
standard, I estimate that at least half of the peer-reviewed scientific1 a$ [1 v ~- F4 b4 A- s
papers in Nature should be retracted. How can one convince the editors and7 z. g3 x& j# S- D1 z* C# X7 F' [ T
reviewers that their proposed theory works for every possible case? One
& C7 f; O% ~: H/ h, o( lcannot. One chooses to apply the theory to typical examples and to
5 o5 ^9 X" j; l+ z& I( kdemonstrate that in (hopefully) all scenarios considered, the theory works
/ H5 g; }- _: u, n) kto a degree, and that that should warrant publication until a counterexample" Z6 \7 a/ N' A# X0 i% V9 f# O# v
is found. I could imagine that Callaway has a sceptical mind, which is
( j) |0 L+ Q: l" \' i/ I# Wcrucial to scientific thinking, but that would be put to better use if he
! ]8 O( x/ W/ q6 y3 f! ?wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly
/ K9 t8 y, t7 U5 ]- kadvanced, non-detectable drug that the Chinese have come up with in the
- [+ c; d6 y3 s' M# ]: t2 D2 q2 K! ^past 4 years (they obviously did not have it in Beijing, otherwise why not
7 O' {: }2 u. @$ p* ause it and woo the audience at home?), based on data and rational derivation
- p5 f0 x1 D$ z/ F' {( \) P. This article, however, can be interpreted as saying that all athletes are
# G! H/ j% v# V& `" J$ T3 Fdoping and the authorities are just not good enough to catch them. That may- K8 |) k: N, {" |4 X+ F
be true, logically, but definitely will not make the case if there is ever a2 y- j j8 ]$ _, T. Q
hearing by the governing body for water sports, FINA, to determine if Ye
7 A/ J g+ x7 M% xhas doped. To ask whether it is possible to obtain a false negative in a
& r& p% O, d. t1 l9 edrug test looks like a rigged question to me. Of course it is possible:- n2 u# l1 W- m* a
other than the athlete taking a drug that the test is not designed to detect
& i q: A1 n3 K7 V, h4 s# `7 p, anyone who has taken quantum 101 will tell you that everything is
N4 C' D8 x+ V* `' zprobabilistic in nature, and so there is a probability that the drug in an
3 v6 [1 T$ `6 M- o+ Z3 Vathlete’s system could tunnel out right at the moment of the test. A slight- W8 s, I. |' |, d _
chance it may be, but should we disregard all test results because of it?
2 Y o4 ~( ], d4 E: I l4 @Let’s be practical and reasonable, and accept that the World Anti-Doping3 W( t7 L- b/ [) }
agency (WADA) is competent at its job. Ye’s urine sample will be stored for
7 H' {6 X+ a6 `, Weight years after the contest for future testing as technology advances.
, u; [# n9 U' G2 d# ?8 B; Y$ eInnocent until proven guilty, shouldn’t it be?+ Y! U# E+ {4 t; t* U
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Sixth, and the last point I would like to make, is that the out-of-
. f) t$ `) w B- ^competition drug test is already in effect, which Callaway failed to mention3 i# f" G, X% p. B! k/ O
. As noted in the president of WADA’s press release, drug testing for
4 |; S$ v' ~; R- ~' rOlympians began at least six months before the opening of the London
3 |- m' B/ V, J L; x' ]Olympics. Furthermore, 107 athletes have been banned from this Olympics for
* Y# R" u4 G( _2 Xdoping. That may be the reason that “everyone will pass at the Olympic
! J+ V5 }: M1 i8 Y; E4 K3 _games. Hardly anyone fails in competition testing” — those who did dope
& O3 s) m1 N/ ~9 p+ |5 ?: W+ Bhave already been caught and sanctioned. Callaway is free to suggest that a3 i% Q( b) W: V1 `/ f1 ]
player could have doped beforehand and fooled the test at the game, but this- s7 K+ t/ y' d' j3 ?/ C
possibility is certainly ruled out for Ye.
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: k; Q& O+ v: D# fOver all, even though Callaway did not falsify any data, he did (
# \* ~$ \. s) D/ o, E. P J7 [intentionally or not) cherry-pick data that, in my view, are far too
7 r) u# }- X2 f, C" c# dsuggestive to be fair and unbiased. If you want to cover a story of a
3 D w& D: B% Xsuspected doping from a scientific point of view, be impartial and provide
q. m$ C$ b6 c* b" Q6 nall the facts for the reader to judge. You are entitled to your
; M' y( r8 d X5 Uinterpretation of the facts, and the expression thereof in your piece,+ c V$ B% v3 R |+ e s/ _
explicitly or otherwise, but showing only evidence that favours your5 s& t# A) ?1 P7 Y4 ]
argument is hardly good science or journalism. Such an article in a journal4 [: k; k1 y( g# p. Q6 H, h% @) x
such as Nature is not an appropriate example of how scientific research or
, L2 l" i/ w/ t8 h$ x5 f1 @' ~9 u6 hreporting should be done. |
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