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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
+ `) Q; Y% b! s% J8 j: h2 H1 i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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9 I' W. h* z3 H* ^# K0 R! v# Phttp://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html1 U9 m6 s- Y& B& W/ L8 P
3 h r, D+ w& ?FROM LAI JIANG, Department of Chemistry, University of Pennsylvania# y3 i- v- M" w5 Z
3 e9 C" q+ C2 | `9 S/ ?It is a shame to see Nature — which nearly all scientists, including myself
. `5 Y& P5 |/ v4 M, regard as one of the most prestigious and influential physical-science
5 i8 @( ?) k' |& [magazines — publish a thinly veiled biased article like this. Granted, this
8 n! ` v3 X$ m! Z% Q' Z5 z6 Ris not a peer-reviewed scientific article and did not go through the$ a" K8 I4 a% l' W- E$ t
scrutiny of picking referees. But to serve as a channel for the general6 e' d/ a/ ^4 t' \
populace to be in touch with and appreciate science, the authors and editors4 I- w" [$ f* [
should at least present the readers with facts within the proper context," m3 j) A5 p7 J* \: Q6 w6 v3 d. G2 ^
which they blatantly failed to do.% A( [5 \! C1 k$ u2 z9 W* w
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First, to identify Ye’s performance increase, Ewen Callaway compared her+ P! ^& c" V" O% D! r+ l/ ~9 E/ i0 N
Olympic 400-metre IM time with her performance at the World Championships in' e4 q8 i" g( F& e% E
2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “
% M' I; y, x2 X; f( H- janomalous” improvement of around 7 seconds (6.72 s). In fact, her previous& q+ ^; c% o! @# i; R* M1 l7 m
personal best was 4:33.79 at the Asian Games in 2010. This leads to an2 H) J) X" C/ x4 r; K# G
improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the
. I' q4 n# b hdifference between the gold and silver medal, I see no reason for 5.38 s to
2 g* m* C& c$ T- x$ wbe treated as 7 s.
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Second, as previously pointed out, Ye is only 16 years old and her body is
9 M# s" y' g( n! w; o$ ~, zstill developing. Bettering oneself by 5 seconds over two years may seem# O( ~! b) V2 o1 c3 q
impossible for an adult swimmer, but it certainly happens among youngsters.
/ | c! ^; j- ?( rAn interview with Australian gold medallist Ian Thorpe revealed that his 400# P4 v5 w* r: m7 p; s5 r8 |9 z( @
-metre freestyle time improved by 5 seconds between the ages of 15 and 16.
~# k. S) q, [) P$ yFor regular people, including Callaway, it may be hard to imagine what an) p4 ^+ O# `5 |! C7 u& y! k A
elite swimmer can achieve as he or she matures and undergoes scientific and
6 ]8 s1 C+ j+ \. w, Ppersistent training. But jumping to the conclusion that it is “anomalous”$ b9 `. P) c8 a
based on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound./ z/ j' }2 u2 a! n# A
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Third, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook
2 y) F+ v+ @- R' texample of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in5 `* |% H- u- t5 \8 b- C( l
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so$ i _3 S2 _9 y
he chose not to push himself too hard and to conserve his energy for later$ O7 o6 C7 a% Y2 w- Y7 b, c2 C
events (whether this conforms to the Olympic spirit and the ‘use one’s- n# e2 O$ c A" l) S# y
best efforts to win a match’ requirement that the Badminton World
; }0 e7 e% o1 K! U$ tFederation recently invoked to disqualify four badminton pairs is another! g4 B$ q- ~) T# L% E, C
topic worth discussing, though probably not in Nature). Ye, on the other
+ E) X. n! Q) P i9 zhand, was trailing behind after the first 300 metres and relied on freestyle
. {8 n% p8 z8 X( Y# t8 C, in which she has an edge, to win the race. Failing to mention this. ]& a4 p% O4 j& V
strategic difference, as well as the fact that Lochte is 23.25 seconds
7 ^7 v. L- N! i: Afaster (4:05.18) than Ye overall, creates the illusion that a woman swam& U: E: ]. g) a) o" B, |
faster than the best man in the same sport, which sounds impossible. Putting
2 p9 c3 x, M5 b2 Daside the gender argument, I believe this is still a leading question that% L2 s0 Y2 |% @% I* V! l& {
implies to the reader that there is something fishy going on.
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. r" W1 e7 c7 m+ pFourth is another example of cherry-picking. In the same event, there are, o' ?, }: E# a
four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93, h7 l4 [' G/ M, f' j
s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s u9 Q0 O2 X0 C
), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns7 ]! I: |: D: p: F' }
out, if we are just talking about the last 50 metres in a 400-metre IM,9 r/ L; N& B& @% M( j
Lochter is not the example I would have used if I were the author. What kind6 S# L: n0 R2 c6 |4 Y1 I
of scientific rigorousness is Callaway trying to demonstrate here? Is it
9 D U/ \0 _6 u: blogical that if Lochter is the champion, we should assume that he leads in: D1 ^8 E2 } ^4 ~7 j
every split? That would be a terrible way to teach the public how science8 d' {! K; {+ y' ?- _# X' g }
works.
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% x$ T# P! R, [% I1 k# c, A: rFifth is the issue I oppose the most. Callaway quotes Ross Tucker and
' l2 x4 T- U& \5 Z) i1 jimplies that a drug test cannot rule out the possibility of doping. Is this, m, e o7 b' P8 i1 P2 g
kind of agnosticism what Nature really wants to teach its readers? By that
6 k1 V9 H; A2 astandard, I estimate that at least half of the peer-reviewed scientific% p' c: u4 M! n) x5 n
papers in Nature should be retracted. How can one convince the editors and
+ u0 P5 {$ T; ^) ? Z" ^reviewers that their proposed theory works for every possible case? One
$ n8 L; j$ V9 t- _9 Vcannot. One chooses to apply the theory to typical examples and to
6 _( I/ g& ?% m& m2 c/ idemonstrate that in (hopefully) all scenarios considered, the theory works) k5 |* H: j3 s: \1 G+ h, A
to a degree, and that that should warrant publication until a counterexample" p/ B8 u7 o( Q8 P7 ?' o) Y
is found. I could imagine that Callaway has a sceptical mind, which is4 {& l9 `+ d# L/ i% }& k2 P4 O* s
crucial to scientific thinking, but that would be put to better use if he' R& G( @& N, e
wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly
/ K7 K) r4 @/ k" A2 h" f9 R5 U; hadvanced, non-detectable drug that the Chinese have come up with in the& V- j1 R: q0 i" l# S
past 4 years (they obviously did not have it in Beijing, otherwise why not
" {1 c2 W! ]& ^5 _: Suse it and woo the audience at home?), based on data and rational derivation
/ s8 Q: o9 ^! B' _. This article, however, can be interpreted as saying that all athletes are
- l# d. j7 b. p V) J0 Gdoping and the authorities are just not good enough to catch them. That may/ Q9 \$ o# Y$ R9 J+ D9 ~+ v. k' W
be true, logically, but definitely will not make the case if there is ever a
% z7 z5 X& N5 n2 o6 z8 O9 {hearing by the governing body for water sports, FINA, to determine if Ye& n2 N# Y! |% ?% f! P+ v
has doped. To ask whether it is possible to obtain a false negative in a
, e& a9 [: O3 T* Xdrug test looks like a rigged question to me. Of course it is possible:
: N% t+ O" a1 F2 d* |other than the athlete taking a drug that the test is not designed to detect8 n7 t0 j, N# q2 P
, anyone who has taken quantum 101 will tell you that everything is
+ O9 k" O9 O0 z$ y7 Aprobabilistic in nature, and so there is a probability that the drug in an9 ~7 h w0 F5 A6 |
athlete’s system could tunnel out right at the moment of the test. A slight
4 G7 n* n" e( k- Q' |+ Mchance it may be, but should we disregard all test results because of it?
& f6 V( X/ J4 XLet’s be practical and reasonable, and accept that the World Anti-Doping
, o6 i* b- Y1 Y! M2 v, R- }& kagency (WADA) is competent at its job. Ye’s urine sample will be stored for4 c- t2 u3 O8 ?- ]6 }5 z
eight years after the contest for future testing as technology advances.- P0 `! j* s. E! K2 X& i
Innocent until proven guilty, shouldn’t it be?- z U' _- o* B; y, g# L2 Y
" j$ U9 ~( N! O& f9 |2 _6 ySixth, and the last point I would like to make, is that the out-of-4 ~# _! R) Y E% F7 O5 P# ^
competition drug test is already in effect, which Callaway failed to mention% [( x6 W/ g; l1 w
. As noted in the president of WADA’s press release, drug testing for
. c0 r: m9 o# w' V; kOlympians began at least six months before the opening of the London. i9 ^+ a. H1 z: t
Olympics. Furthermore, 107 athletes have been banned from this Olympics for
5 I5 X5 x5 C; qdoping. That may be the reason that “everyone will pass at the Olympic
: L8 }# \8 R5 ~1 |; M# N: t' tgames. Hardly anyone fails in competition testing” — those who did dope
2 @5 Q/ r, j, r0 r8 `have already been caught and sanctioned. Callaway is free to suggest that a% ?/ t+ d% x; X: Q) z
player could have doped beforehand and fooled the test at the game, but this
' o9 `- `" {8 X6 L0 i% f) dpossibility is certainly ruled out for Ye.
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Over all, even though Callaway did not falsify any data, he did (
- E& \' b5 _+ a- k# }intentionally or not) cherry-pick data that, in my view, are far too
! @7 g, c3 Q% D' x3 R- ?suggestive to be fair and unbiased. If you want to cover a story of a5 O; J7 ?' i' N9 l7 T3 ^
suspected doping from a scientific point of view, be impartial and provide$ R; k$ \5 J- Y* I1 P; U+ r
all the facts for the reader to judge. You are entitled to your- S) g% }& H- w+ U* d
interpretation of the facts, and the expression thereof in your piece,
5 q* r" @# o* a' Jexplicitly or otherwise, but showing only evidence that favours your
. d; v H8 l% _- Z3 F+ s! largument is hardly good science or journalism. Such an article in a journal* l* A. z* E) B9 S
such as Nature is not an appropriate example of how scientific research or
/ B$ n% d8 z2 t: |reporting should be done. |
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