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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
A5 @! D. L9 ^$ F7 a* [如果是中国长大的,英语能到这种程度真是很不简单。4 m% a) k5 H9 m# U! v9 Y
; c" Q& D8 W& T, ghttp://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html
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FROM LAI JIANG, Department of Chemistry, University of Pennsylvania+ r0 U' N: m/ d6 ]: Y# N f0 K. j
1 {2 J) [3 V2 `1 r* `- [5 J) VIt is a shame to see Nature — which nearly all scientists, including myself; G* q- y$ P2 u
, regard as one of the most prestigious and influential physical-science: Z7 y$ k1 |* v3 Z4 L2 ^5 H+ k
magazines — publish a thinly veiled biased article like this. Granted, this
2 B# ]3 v) e" M0 A! [is not a peer-reviewed scientific article and did not go through the! S# j/ j- v$ I
scrutiny of picking referees. But to serve as a channel for the general$ w3 x" S4 q+ O# L
populace to be in touch with and appreciate science, the authors and editors- L0 s7 J: E! M4 b
should at least present the readers with facts within the proper context,
* b- L5 x, Q# Z( s- Awhich they blatantly failed to do.
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First, to identify Ye’s performance increase, Ewen Callaway compared her
! p Y; m% g/ r& VOlympic 400-metre IM time with her performance at the World Championships in
2 D' S2 h' Q7 _) _, j2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “, U& a* K5 d# B4 M \+ w
anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous
5 P$ d1 o2 ~. q& I- @" S8 `personal best was 4:33.79 at the Asian Games in 2010. This leads to an( |7 {8 H; Z% c+ e" a
improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the
' {6 ?( `* g7 U$ W9 ]difference between the gold and silver medal, I see no reason for 5.38 s to
9 S6 X3 G! i, C& z8 J0 rbe treated as 7 s.5 l# d3 s8 I& y0 v; c
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Second, as previously pointed out, Ye is only 16 years old and her body is
5 Q+ J( ^6 E1 zstill developing. Bettering oneself by 5 seconds over two years may seem
; g5 E. X# z5 M4 M$ |impossible for an adult swimmer, but it certainly happens among youngsters.! p9 _- e- F; P3 f3 ]& O
An interview with Australian gold medallist Ian Thorpe revealed that his 400
* z& X6 y$ o5 b. A# J# A- |-metre freestyle time improved by 5 seconds between the ages of 15 and 16./ D) v$ L$ P6 K+ z
For regular people, including Callaway, it may be hard to imagine what an/ X# Y2 \7 ?5 t' f; r2 }
elite swimmer can achieve as he or she matures and undergoes scientific and' h0 D& [6 N* D# B6 } j: @9 j7 J9 u
persistent training. But jumping to the conclusion that it is “anomalous”
0 X' h: j7 v) I0 n: ]: L" abased on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.% u' o' F! X2 H5 |/ U
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Third, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook
; Q4 N# r! x" z' z, Z. i- rexample of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in- I" V3 d( Q) o: o. M4 t2 [$ |1 T
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so
2 J3 |# t8 i6 ~he chose not to push himself too hard and to conserve his energy for later1 v: S& \ Q. L& N, y- v/ _
events (whether this conforms to the Olympic spirit and the ‘use one’s
& j, @) `; C9 `7 ~3 j2 Xbest efforts to win a match’ requirement that the Badminton World# B' b2 Y( {) w' F0 D
Federation recently invoked to disqualify four badminton pairs is another
, g9 A1 D7 e7 M# T. Q& Vtopic worth discussing, though probably not in Nature). Ye, on the other: |# u/ P2 l3 B6 f/ J4 a6 O+ s/ a% t
hand, was trailing behind after the first 300 metres and relied on freestyle0 n; v) j0 m e) G3 x/ i1 B
, in which she has an edge, to win the race. Failing to mention this
2 s$ K# l z5 U' l2 L! Sstrategic difference, as well as the fact that Lochte is 23.25 seconds
8 p0 f* |0 n$ P! }faster (4:05.18) than Ye overall, creates the illusion that a woman swam/ n5 e: O2 T: ~( |% l" F& i
faster than the best man in the same sport, which sounds impossible. Putting
: P/ j; B3 a% I0 Raside the gender argument, I believe this is still a leading question that
8 h+ m) n! _' `" u3 Q4 y7 `+ N! Oimplies to the reader that there is something fishy going on.# R' k0 T! G' \& ?" a
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Fourth is another example of cherry-picking. In the same event, there are9 g- }8 Q+ Q- n# `3 b7 J6 |
four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.939 I5 u5 B6 q: W; _
s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s
- S3 b/ @9 W! V- ]# m), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns, u# Z7 ]9 j' `" c
out, if we are just talking about the last 50 metres in a 400-metre IM," F. l' T2 \# L) k' L( ^
Lochter is not the example I would have used if I were the author. What kind
: Y: o% z4 N: q; Xof scientific rigorousness is Callaway trying to demonstrate here? Is it+ y5 H7 z1 K( K" w
logical that if Lochter is the champion, we should assume that he leads in
i$ i0 B) P) c/ e& b7 @/ [every split? That would be a terrible way to teach the public how science2 q- {9 \4 Z* a- o
works.8 o& c( n1 l( ?) Q- I; n) U
' c: @$ X) ~6 _7 \4 e# ]# @Fifth is the issue I oppose the most. Callaway quotes Ross Tucker and
$ B% I" z2 p1 R2 t; u1 c b& g4 F3 Qimplies that a drug test cannot rule out the possibility of doping. Is this5 W! X0 W k# H Y$ Z
kind of agnosticism what Nature really wants to teach its readers? By that
`) t! m3 _ O9 Estandard, I estimate that at least half of the peer-reviewed scientific1 l% y# Y* N2 L, K( B ]
papers in Nature should be retracted. How can one convince the editors and+ E! _4 n5 r1 p1 }: V9 q
reviewers that their proposed theory works for every possible case? One0 r; ^4 Y9 \+ C$ u8 H& i
cannot. One chooses to apply the theory to typical examples and to+ G" o2 B; P6 @1 i) }$ R+ U
demonstrate that in (hopefully) all scenarios considered, the theory works; E. t; o M2 `# |
to a degree, and that that should warrant publication until a counterexample( t- {5 }' k8 r3 Z. \) @% S
is found. I could imagine that Callaway has a sceptical mind, which is3 I1 ^2 B4 s% `' F
crucial to scientific thinking, but that would be put to better use if he; l3 v4 Q2 ^" [8 Z! c* i {
wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly
7 n' P+ N6 [- F* T! w* b8 Q! Ladvanced, non-detectable drug that the Chinese have come up with in the
! L* D6 b0 ]% d3 {( F6 C ^( Mpast 4 years (they obviously did not have it in Beijing, otherwise why not
; D5 o: y' p ^8 [* A1 C: \use it and woo the audience at home?), based on data and rational derivation
8 w4 _" v& o5 R0 \0 q* p. This article, however, can be interpreted as saying that all athletes are
& F! K5 c5 {) c+ c0 y4 j4 p9 P! Tdoping and the authorities are just not good enough to catch them. That may' b3 e/ A. A6 t! Z5 l! O
be true, logically, but definitely will not make the case if there is ever a
8 H' r F+ Y: I( d, ?! P; Vhearing by the governing body for water sports, FINA, to determine if Ye# Y- J. A9 a1 E. P- q) `: O
has doped. To ask whether it is possible to obtain a false negative in a
. q8 h' W2 l! W8 e6 j z! Fdrug test looks like a rigged question to me. Of course it is possible:1 ^$ d; T* S) K' \
other than the athlete taking a drug that the test is not designed to detect
+ v3 z! d2 w: g# N" d& d, anyone who has taken quantum 101 will tell you that everything is
! B5 g( j* D, |6 f7 [) w6 I0 {# Wprobabilistic in nature, and so there is a probability that the drug in an
8 R, ^7 U! g1 G& N3 f$ {9 xathlete’s system could tunnel out right at the moment of the test. A slight
5 j1 `) j& e/ H- c u/ Q8 Hchance it may be, but should we disregard all test results because of it?/ V2 ^7 v/ j7 A. M* v u
Let’s be practical and reasonable, and accept that the World Anti-Doping
( ?. N' [+ V" }5 ragency (WADA) is competent at its job. Ye’s urine sample will be stored for3 J" |* }# a2 L# a' v0 o6 v% j5 y) \
eight years after the contest for future testing as technology advances.
7 z) X# |6 }) m. @5 l# V3 ~Innocent until proven guilty, shouldn’t it be?
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Sixth, and the last point I would like to make, is that the out-of-% c m" ]' l2 } I0 D7 Q# x
competition drug test is already in effect, which Callaway failed to mention! j/ x* e6 i5 O( T$ \3 J' u
. As noted in the president of WADA’s press release, drug testing for4 ^ a" @: {0 f4 P% {
Olympians began at least six months before the opening of the London+ ?+ |- o4 I6 I; S# R8 n
Olympics. Furthermore, 107 athletes have been banned from this Olympics for
1 S- S* U: T3 b# Udoping. That may be the reason that “everyone will pass at the Olympic
7 ^$ A0 ~ w2 cgames. Hardly anyone fails in competition testing” — those who did dope7 p4 v+ D/ o+ F+ i8 z2 F# Z5 v
have already been caught and sanctioned. Callaway is free to suggest that a6 B; p1 _9 D: n- T$ D% U
player could have doped beforehand and fooled the test at the game, but this
- y, o" i& R8 b: J! i* n) |2 opossibility is certainly ruled out for Ye.5 J2 P3 ?8 U8 I% Q
" f4 B, U8 q" t, P. sOver all, even though Callaway did not falsify any data, he did (6 l9 g+ Y5 ^4 ~2 Y
intentionally or not) cherry-pick data that, in my view, are far too
1 q _- j6 b; M8 F0 e5 z$ usuggestive to be fair and unbiased. If you want to cover a story of a6 G) q8 ^: F5 w7 d- d! E1 |2 d
suspected doping from a scientific point of view, be impartial and provide
' a( Q# ^/ ?# x$ ~: B' V- rall the facts for the reader to judge. You are entitled to your
' ]4 u3 g: b" T0 _interpretation of the facts, and the expression thereof in your piece,
; d3 U l' |6 y7 M1 F* ?explicitly or otherwise, but showing only evidence that favours your
; m/ ?" [8 v, ~7 f" K/ S: ?argument is hardly good science or journalism. Such an article in a journal
$ B, }8 y7 b: y5 }3 P& bsuch as Nature is not an appropriate example of how scientific research or
% t; g/ R( y, y( e1 wreporting should be done. |
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