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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
3 q" S, G$ j/ c3 e如果是中国长大的,英语能到这种程度真是很不简单。2 V. R! ], o/ v& Y+ B7 ]
( m9 W; w, w2 v3 _- {http://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html
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FROM LAI JIANG, Department of Chemistry, University of Pennsylvania
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" M0 O! T1 d; `It is a shame to see Nature — which nearly all scientists, including myself
; B: u5 b0 B$ o ]# x4 Q, regard as one of the most prestigious and influential physical-science
0 T+ d, F9 {0 [magazines — publish a thinly veiled biased article like this. Granted, this
7 P( j9 X4 F3 g' qis not a peer-reviewed scientific article and did not go through the
, M% u6 W) m1 ~# E3 c. Cscrutiny of picking referees. But to serve as a channel for the general
7 Y5 @" t5 r' w3 w) npopulace to be in touch with and appreciate science, the authors and editors1 a& _1 W b+ c9 B! K8 z
should at least present the readers with facts within the proper context,
/ E& Z# A3 l9 G0 {) A) j* Ewhich they blatantly failed to do.
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5 x" ]$ L. T) d0 mFirst, to identify Ye’s performance increase, Ewen Callaway compared her) P" [6 z, d$ c
Olympic 400-metre IM time with her performance at the World Championships in
' b/ R8 F3 T$ F, D; J% a2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “. c3 g. S9 v7 P( T$ O" r( R5 ^( i
anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous: {+ d, p8 t2 v2 x4 [: O+ i B
personal best was 4:33.79 at the Asian Games in 2010. This leads to an( f0 ~6 J' ?+ Z# d5 A/ A9 a
improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the$ {+ [: t& v( M) w( ]4 O; n& ~
difference between the gold and silver medal, I see no reason for 5.38 s to
0 Q" e5 h# l4 @6 B9 Gbe treated as 7 s.6 L# g1 o- b2 Y
; j& w3 N% J. C7 C2 qSecond, as previously pointed out, Ye is only 16 years old and her body is" C$ x( P' I$ O; R
still developing. Bettering oneself by 5 seconds over two years may seem; X/ v5 G A& ~* U E2 |) ?
impossible for an adult swimmer, but it certainly happens among youngsters.
3 e- ^1 S% E* f) ~, tAn interview with Australian gold medallist Ian Thorpe revealed that his 400
8 D/ K0 a* M2 W-metre freestyle time improved by 5 seconds between the ages of 15 and 16.
& h7 _ X1 F) x! nFor regular people, including Callaway, it may be hard to imagine what an
' Q3 S( A# P: O% v) z1 Oelite swimmer can achieve as he or she matures and undergoes scientific and( r5 K5 S. ?6 t* c' F+ |! O
persistent training. But jumping to the conclusion that it is “anomalous”
: {% I& c4 q( T8 n4 W, j% [based on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.
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0 N3 E# X+ A) D- MThird, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook: g4 J) d" y% j7 B( y, t
example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in
( p7 {$ @' \" x8 q+ ithe last 50 metres, but Lochte had a huge lead in the first 300 metres, so
4 C0 ]" A: P* J4 o' D3 h/ R5 Yhe chose not to push himself too hard and to conserve his energy for later$ B. M9 d% }) r8 h$ F; t C
events (whether this conforms to the Olympic spirit and the ‘use one’s
) @& I# Z4 ?, x4 i: R* R" d2 r& dbest efforts to win a match’ requirement that the Badminton World4 S6 t1 O$ V, F
Federation recently invoked to disqualify four badminton pairs is another" q' C1 m' w: t2 Q
topic worth discussing, though probably not in Nature). Ye, on the other: z' \1 R2 W$ ^( k; c
hand, was trailing behind after the first 300 metres and relied on freestyle
; L$ g3 ^% _6 ^( M8 Q; ^, in which she has an edge, to win the race. Failing to mention this( k9 |, v0 J! f) y2 m- S" y
strategic difference, as well as the fact that Lochte is 23.25 seconds
2 r: r( m2 i8 h+ p: ` {7 kfaster (4:05.18) than Ye overall, creates the illusion that a woman swam- t# T4 U# _ T* @$ D6 h
faster than the best man in the same sport, which sounds impossible. Putting
# ?2 _, Y5 ^5 v7 m n! paside the gender argument, I believe this is still a leading question that9 b4 g7 D" v9 I8 Q! p/ [; p* d
implies to the reader that there is something fishy going on.8 |: z M1 N; [
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Fourth is another example of cherry-picking. In the same event, there are
# S( z, k6 G8 m; @0 U; gfour male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93; _6 S8 S+ E5 V7 L- o) ?' Z
s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s
* ~/ ~! X2 H/ Q; E4 U), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns
- w( s$ \& f. Y+ S/ _out, if we are just talking about the last 50 metres in a 400-metre IM,: Q3 ?/ G! _; x( |5 r$ A
Lochter is not the example I would have used if I were the author. What kind
9 E: ^. \# _0 ~0 }2 _/ sof scientific rigorousness is Callaway trying to demonstrate here? Is it; Y$ `9 s$ r* E+ u8 M8 V8 C# H; V
logical that if Lochter is the champion, we should assume that he leads in
; @" D. _% y% `4 y- U. yevery split? That would be a terrible way to teach the public how science
# f. z. ~* |. A5 H8 K Z) kworks.: q! J+ h$ F& M0 k1 x/ _
. k I/ V8 J2 y# q2 q8 f) i- {Fifth is the issue I oppose the most. Callaway quotes Ross Tucker and
( u3 L/ D3 x' a% @9 W @- h F* P) e8 rimplies that a drug test cannot rule out the possibility of doping. Is this
8 G. k4 J' P0 u6 b% j/ bkind of agnosticism what Nature really wants to teach its readers? By that
0 v% k8 [8 T7 I; hstandard, I estimate that at least half of the peer-reviewed scientific( g2 T8 w; @( U. I( ~$ C
papers in Nature should be retracted. How can one convince the editors and
, u- k# }& u; `& f% u" V* Q( Ireviewers that their proposed theory works for every possible case? One: P3 m5 m$ B+ @3 |
cannot. One chooses to apply the theory to typical examples and to
+ Q! X% p H& @! F) p, |+ J0 Edemonstrate that in (hopefully) all scenarios considered, the theory works( [& e' L( X3 h5 s# I- t
to a degree, and that that should warrant publication until a counterexample/ j; d8 r S T
is found. I could imagine that Callaway has a sceptical mind, which is& n( D) f. D2 ~+ b
crucial to scientific thinking, but that would be put to better use if he
/ }1 j' z, c- {; c( ]: e' ]5 w, @wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly' @$ ^) p& h7 |3 ]. U! ~
advanced, non-detectable drug that the Chinese have come up with in the
9 H$ `4 _( y0 @past 4 years (they obviously did not have it in Beijing, otherwise why not
. d1 y' T/ X: D1 \8 cuse it and woo the audience at home?), based on data and rational derivation9 V4 W5 e: O% k2 ?( B
. This article, however, can be interpreted as saying that all athletes are
4 ~8 f! t& Q1 J- _: T! |! N& k# tdoping and the authorities are just not good enough to catch them. That may! y+ q% l! g: n* x" f
be true, logically, but definitely will not make the case if there is ever a
6 A X& m T: m) |0 z" hhearing by the governing body for water sports, FINA, to determine if Ye# o; j7 ?/ s$ Y9 @, x
has doped. To ask whether it is possible to obtain a false negative in a
8 e7 l3 ?$ W- y7 Jdrug test looks like a rigged question to me. Of course it is possible:
/ ?8 a: g7 c6 g, A3 @# iother than the athlete taking a drug that the test is not designed to detect
) f2 M7 ^& h7 O+ e3 K, anyone who has taken quantum 101 will tell you that everything is; e! r" u+ ? w$ ~) k0 M+ Y8 T y, L
probabilistic in nature, and so there is a probability that the drug in an
: U: b! r5 ^: F" }8 S6 Iathlete’s system could tunnel out right at the moment of the test. A slight+ Y+ L9 t8 X2 i) H5 M' M. U
chance it may be, but should we disregard all test results because of it?8 @, c* C; r$ o/ r8 C: P# I! R
Let’s be practical and reasonable, and accept that the World Anti-Doping
% x v j8 z' H; Fagency (WADA) is competent at its job. Ye’s urine sample will be stored for8 v+ a1 @5 {" s$ u
eight years after the contest for future testing as technology advances.
+ A" U) k# `. k& G5 IInnocent until proven guilty, shouldn’t it be?7 a- I; s( S$ t7 X+ ?" w8 s
, K4 v- d) Q! D3 ^Sixth, and the last point I would like to make, is that the out-of-- k: u [# o0 Q1 j$ X% T
competition drug test is already in effect, which Callaway failed to mention
) y9 }+ C% D) ^# {" y e( j. As noted in the president of WADA’s press release, drug testing for
+ H9 r$ \, ~% j0 z9 t& ~Olympians began at least six months before the opening of the London
$ l- k4 c: `3 ?+ g" b) l) UOlympics. Furthermore, 107 athletes have been banned from this Olympics for
# j" N0 j( ^4 h, a c: |% Adoping. That may be the reason that “everyone will pass at the Olympic
0 ` m, J7 c, Q9 b) p, @- d7 Lgames. Hardly anyone fails in competition testing” — those who did dope! d! }# Z- x" J
have already been caught and sanctioned. Callaway is free to suggest that a' ^0 x4 Q9 b0 ~1 K' i4 y
player could have doped beforehand and fooled the test at the game, but this
1 ]. }6 K# p( ~! P' n. e& bpossibility is certainly ruled out for Ye.7 ?# D0 s3 ~+ \4 m( I' l/ o
# V1 V" [8 | f3 SOver all, even though Callaway did not falsify any data, he did (
/ `/ U5 h3 B' P( Nintentionally or not) cherry-pick data that, in my view, are far too
, X$ o# ~3 j* wsuggestive to be fair and unbiased. If you want to cover a story of a
+ E- S1 S/ O' u$ ^8 Q0 Hsuspected doping from a scientific point of view, be impartial and provide, R( a' y' ?) f" x) o
all the facts for the reader to judge. You are entitled to your
R8 B* F E1 L# u! h- Sinterpretation of the facts, and the expression thereof in your piece," f$ v4 ?; l, r/ J8 j
explicitly or otherwise, but showing only evidence that favours your" Z- u2 G+ K9 r+ S% I N2 E4 g8 H
argument is hardly good science or journalism. Such an article in a journal
: g/ `: _; E, G' ~3 G; x& E. dsuch as Nature is not an appropriate example of how scientific research or
/ j, @- z. o2 `8 @8 s S, Wreporting should be done. |
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