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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
: p$ y% k( p, Z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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http://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html" ^6 G- J9 w( L: G
+ |6 z' N; a$ I* |' y5 v" Y5 e& q" LFROM LAI JIANG, Department of Chemistry, University of Pennsylvania
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It is a shame to see Nature — which nearly all scientists, including myself; i7 J& f- |8 F# T3 ?$ q, n4 M
, regard as one of the most prestigious and influential physical-science1 E1 y: e K+ s6 |" K
magazines — publish a thinly veiled biased article like this. Granted, this w* ]- N' e: K& _6 ]! I2 \
is not a peer-reviewed scientific article and did not go through the- V6 T7 y. _8 u
scrutiny of picking referees. But to serve as a channel for the general/ A# m7 A/ G) ]0 K
populace to be in touch with and appreciate science, the authors and editors
" i; }/ L; b' [" U, fshould at least present the readers with facts within the proper context, U+ g/ L' B6 D2 a5 U
which they blatantly failed to do.8 F J( Q% M3 |/ C% i1 R3 B
0 I2 R. {6 r. A) d* t+ GFirst, to identify Ye’s performance increase, Ewen Callaway compared her0 M* a* h/ w: Z' n
Olympic 400-metre IM time with her performance at the World Championships in+ F5 ?5 W1 d4 \# T/ \
2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “+ z! P$ I" S- Q9 T( U1 x* U
anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous4 s! l j0 v3 b0 T1 `( A
personal best was 4:33.79 at the Asian Games in 2010. This leads to an
" r& |( R3 ~& W( I6 S$ Iimprovement of 5.38 seconds. In a sporting event in which 0.1 s can be the
# ?- `" c( q! }1 g) ^6 Fdifference between the gold and silver medal, I see no reason for 5.38 s to1 ~: d" `# p* F# V
be treated as 7 s.: U. u0 X9 l$ Z& W( y1 W1 V' l
# g/ K/ Q2 m1 e2 B; W; ^. CSecond, as previously pointed out, Ye is only 16 years old and her body is( q. o' [) s1 A, v+ i
still developing. Bettering oneself by 5 seconds over two years may seem, }% M9 d: `' p$ T1 G. A$ y
impossible for an adult swimmer, but it certainly happens among youngsters.' V2 p0 i1 f, o
An interview with Australian gold medallist Ian Thorpe revealed that his 400
# E+ W$ p4 q3 F+ q-metre freestyle time improved by 5 seconds between the ages of 15 and 16.; [2 E: v3 @% f/ s& w3 G3 p# w4 N
For regular people, including Callaway, it may be hard to imagine what an: ]( `2 z6 N9 |# y; `+ R% r
elite swimmer can achieve as he or she matures and undergoes scientific and' f7 j* n2 S3 \. Z6 V
persistent training. But jumping to the conclusion that it is “anomalous”) H8 B. |( f' x7 Q) b) `6 T+ _5 {$ x
based on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.: q2 T( u; J: }" y* H
. Z7 p8 @& I' b5 K. T* ^# CThird, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook2 A/ Z: |+ |, [% n! y! \& ?% w- r
example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in/ m) N# z0 Y8 ~1 Z+ i
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so7 _$ g+ M9 r. B+ H
he chose not to push himself too hard and to conserve his energy for later+ B2 ^! x+ I! W
events (whether this conforms to the Olympic spirit and the ‘use one’s' ]' Y! h- V0 x
best efforts to win a match’ requirement that the Badminton World
* ?0 O" f8 j7 O5 XFederation recently invoked to disqualify four badminton pairs is another
. `% ?% K: j: c& q5 T* ftopic worth discussing, though probably not in Nature). Ye, on the other( D* P8 c& @8 U- ]) l+ J
hand, was trailing behind after the first 300 metres and relied on freestyle E% e, T4 P; A: `
, in which she has an edge, to win the race. Failing to mention this4 \* o) @- i$ o% M" k
strategic difference, as well as the fact that Lochte is 23.25 seconds
: i$ f4 B. j8 r0 c" Q5 Efaster (4:05.18) than Ye overall, creates the illusion that a woman swam
1 s# c* {% [8 @" {) v* hfaster than the best man in the same sport, which sounds impossible. Putting
; O6 C$ [8 N/ n$ faside the gender argument, I believe this is still a leading question that5 ]8 J5 N/ \3 A3 H8 O; o1 G
implies to the reader that there is something fishy going on.4 B* S7 S, ^! C7 e; B
4 d* m! c2 E; o. J( C" P0 q% `+ EFourth is another example of cherry-picking. In the same event, there are: [: R, E7 F/ O. S' g. p
four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93) C/ m* f+ O2 A' C
s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s
' k1 L A- |+ g7 }), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns
! B: ?6 X& B' Xout, if we are just talking about the last 50 metres in a 400-metre IM,+ O, K- H9 b* z6 L
Lochter is not the example I would have used if I were the author. What kind
* K3 z: V! @6 ?5 N! wof scientific rigorousness is Callaway trying to demonstrate here? Is it
1 j# |9 L5 i, C# e0 glogical that if Lochter is the champion, we should assume that he leads in& G* g9 Y# U# D/ a l( _# s/ D
every split? That would be a terrible way to teach the public how science. ?0 q3 E' @; l7 Q5 d
works.
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Fifth is the issue I oppose the most. Callaway quotes Ross Tucker and
( j1 S3 a# j5 j6 Z8 L9 U! Eimplies that a drug test cannot rule out the possibility of doping. Is this* e: Y; z) n0 Q# F
kind of agnosticism what Nature really wants to teach its readers? By that
' V4 F8 ]8 w4 ^standard, I estimate that at least half of the peer-reviewed scientific
5 {: w& Q" C, u- [+ L% ]3 Q, \papers in Nature should be retracted. How can one convince the editors and
! \$ m7 }. n' j7 treviewers that their proposed theory works for every possible case? One4 X3 S" u& H$ o; a' `% C' c( a9 g
cannot. One chooses to apply the theory to typical examples and to
& F5 c6 P. s. r0 Jdemonstrate that in (hopefully) all scenarios considered, the theory works/ F. Y) n; u% }& n" n# X. k g
to a degree, and that that should warrant publication until a counterexample
9 w8 C @4 H7 z' Qis found. I could imagine that Callaway has a sceptical mind, which is9 p8 n' E1 E, v! ^# P' o6 D
crucial to scientific thinking, but that would be put to better use if he
6 I% H/ Z6 c: h3 b. qwrote a peer-reviewed paper that discussed the odds of Ye doping on a highly- S% R3 P' x: {+ k1 T& j7 V9 z* t
advanced, non-detectable drug that the Chinese have come up with in the: n5 r2 a8 P& O) z6 O1 F
past 4 years (they obviously did not have it in Beijing, otherwise why not
9 ?" h8 n5 C( z* X# \use it and woo the audience at home?), based on data and rational derivation6 u4 J4 A/ b! J3 e, b' |. a. ^
. This article, however, can be interpreted as saying that all athletes are T' n7 s4 p" `& x& F
doping and the authorities are just not good enough to catch them. That may( E8 M5 M/ m: A
be true, logically, but definitely will not make the case if there is ever a& N, D) a1 a5 o' ~5 R: Y# ]- [
hearing by the governing body for water sports, FINA, to determine if Ye! \# Q }; L5 N0 O
has doped. To ask whether it is possible to obtain a false negative in a" n+ i ?/ J2 ]1 Z8 b- U# s
drug test looks like a rigged question to me. Of course it is possible:
8 F% X- b) @1 F' p6 j" ?' Q0 ?other than the athlete taking a drug that the test is not designed to detect0 c4 Z# W/ A1 z) N# m4 O, H' u( q' [
, anyone who has taken quantum 101 will tell you that everything is b" \; ?5 N6 Q1 u' _+ P6 P
probabilistic in nature, and so there is a probability that the drug in an% l* @$ ~: T _ q5 k. Q
athlete’s system could tunnel out right at the moment of the test. A slight
# W' D+ t' G0 R7 rchance it may be, but should we disregard all test results because of it?
1 D4 D$ A# o7 \9 H6 g7 dLet’s be practical and reasonable, and accept that the World Anti-Doping) @) w3 ~7 K/ n
agency (WADA) is competent at its job. Ye’s urine sample will be stored for; U+ O6 w* d, u% p9 _8 C) S$ T
eight years after the contest for future testing as technology advances." y3 Z9 d. q: H. _4 H
Innocent until proven guilty, shouldn’t it be?( i) P. q P* o# ]) @. q
2 m6 P7 E% ]( B& @Sixth, and the last point I would like to make, is that the out-of-
. O# s; E) ?( Y9 ?competition drug test is already in effect, which Callaway failed to mention
' f' \2 C$ Z1 ?# ~. As noted in the president of WADA’s press release, drug testing for
; j/ R! w. v+ }* P' a9 b8 AOlympians began at least six months before the opening of the London
# j; q! b {4 ]3 R: z dOlympics. Furthermore, 107 athletes have been banned from this Olympics for
, t! C9 L$ \/ Ydoping. That may be the reason that “everyone will pass at the Olympic+ y, P- Y. [0 j' k
games. Hardly anyone fails in competition testing” — those who did dope6 _3 H! B, t$ Q: Z" W9 Z
have already been caught and sanctioned. Callaway is free to suggest that a
& V( t2 K% e" p0 dplayer could have doped beforehand and fooled the test at the game, but this
+ o% C! l0 K% d4 h$ Kpossibility is certainly ruled out for Ye.' D# {$ M' k% r* W9 @$ Q* b' R0 _
. ~, g# l' @2 \& f+ i' t* N: oOver all, even though Callaway did not falsify any data, he did (! g" K& q7 |! ?) I4 G- x. F
intentionally or not) cherry-pick data that, in my view, are far too
- q* X( P Y! S: a, J+ fsuggestive to be fair and unbiased. If you want to cover a story of a
5 \1 Y& A+ S M0 t+ @% P1 V* P7 msuspected doping from a scientific point of view, be impartial and provide
" V$ W" [" r7 n" uall the facts for the reader to judge. You are entitled to your
( U$ A5 K/ `3 X& j; @. ^) Kinterpretation of the facts, and the expression thereof in your piece, y# `$ O. k9 I: a, q% h0 w9 c4 `
explicitly or otherwise, but showing only evidence that favours your7 Y2 s2 n( C; y6 [9 t+ d( x
argument is hardly good science or journalism. Such an article in a journal* }' ?/ T6 I( {+ c, Q. X
such as Nature is not an appropriate example of how scientific research or) {6 U' ]* w$ P7 `
reporting should be done. |
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