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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# u# f, f6 K5 D; a2 k* o7 M
如果是中国长大的,英语能到这种程度真是很不简单。. z+ E3 @. b$ N# g' u; p
1 K# {% h9 G" I2 Shttp://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html
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FROM LAI JIANG, Department of Chemistry, University of Pennsylvania: I# D4 e w }& b
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It is a shame to see Nature — which nearly all scientists, including myself
- ^2 S3 _; C" V9 z+ z, regard as one of the most prestigious and influential physical-science
* v4 \3 _' \( M" E- q }magazines — publish a thinly veiled biased article like this. Granted, this- `) H0 d4 \9 K
is not a peer-reviewed scientific article and did not go through the
& J% s5 P4 R7 l% B! J& } Sscrutiny of picking referees. But to serve as a channel for the general# N/ `0 t* b7 M
populace to be in touch with and appreciate science, the authors and editors
! _+ \- J8 U0 k, z# Hshould at least present the readers with facts within the proper context,; F0 P9 ~) A# v
which they blatantly failed to do.$ T9 y( P& A: n# V7 }- J8 y& t
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First, to identify Ye’s performance increase, Ewen Callaway compared her
$ V5 l- T6 i# {4 |3 k cOlympic 400-metre IM time with her performance at the World Championships in4 J2 i) p3 L: y4 F& u! V
2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “: F6 ~4 m: g$ N- |% Q- a Y
anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous
& q1 n* \1 t) t/ d9 x, N9 L) Hpersonal best was 4:33.79 at the Asian Games in 2010. This leads to an$ X v3 I0 R. }: P2 }) c
improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the( w! U/ y+ ^! V' |* j, T
difference between the gold and silver medal, I see no reason for 5.38 s to& S: }) d( F6 O( C3 u5 p/ M8 g) e
be treated as 7 s.
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Second, as previously pointed out, Ye is only 16 years old and her body is1 ]0 \7 U0 [ o) c" [1 z0 M
still developing. Bettering oneself by 5 seconds over two years may seem
8 F5 J4 h& X# Y- y- @impossible for an adult swimmer, but it certainly happens among youngsters.# ^/ k& L S2 V" w' R" G- [5 G
An interview with Australian gold medallist Ian Thorpe revealed that his 4001 G- \" v; u( r, B
-metre freestyle time improved by 5 seconds between the ages of 15 and 16.0 P2 p# j& ?# k, a
For regular people, including Callaway, it may be hard to imagine what an
8 }- i3 ~3 N) l& \8 n) Lelite swimmer can achieve as he or she matures and undergoes scientific and4 O, H/ j: e) I$ l7 e' C$ z7 r- o: V
persistent training. But jumping to the conclusion that it is “anomalous”3 P! o( V8 O4 w' v+ `2 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
* S/ S& `% c! Y* ^( vexample of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in3 n1 t( v" D: C
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so8 s( k' s! F" z# |, q2 U
he chose not to push himself too hard and to conserve his energy for later
6 D' j- u- v( S. i# k. k4 U' bevents (whether this conforms to the Olympic spirit and the ‘use one’s& B& a# A( y4 j& E
best efforts to win a match’ requirement that the Badminton World3 O! E3 k+ r: J7 {, W% |
Federation recently invoked to disqualify four badminton pairs is another
3 P$ y! t8 Y/ @3 J. \2 s; ]topic worth discussing, though probably not in Nature). Ye, on the other) h, U4 _% A( p% l4 g0 N3 i
hand, was trailing behind after the first 300 metres and relied on freestyle
. p5 i8 u+ T/ ?4 u* l( ~* N, y! H, in which she has an edge, to win the race. Failing to mention this/ f* q. ], d1 u5 y; M3 l0 x9 H
strategic difference, as well as the fact that Lochte is 23.25 seconds& d6 W+ F% V8 u' G+ ~! e
faster (4:05.18) than Ye overall, creates the illusion that a woman swam$ w5 A. I' f7 `! p+ ^
faster than the best man in the same sport, which sounds impossible. Putting* E; j( B8 w# E
aside the gender argument, I believe this is still a leading question that* B7 ~3 Y5 u; i* M
implies 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
' G$ e' V( B5 U% |7 G) {four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93, u, C# E$ @' r# G9 j- y# m3 {: z$ S
s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s
" s3 p7 v& j7 G; ~( f), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns3 e& K' A; L& Q- T; \% ?
out, if we are just talking about the last 50 metres in a 400-metre IM,
' M( `' H' c* v8 ^; `" o* W- ?6 _Lochter is not the example I would have used if I were the author. What kind
2 B( a S3 @0 b [of scientific rigorousness is Callaway trying to demonstrate here? Is it
' ~3 n1 B6 N6 B+ R" mlogical that if Lochter is the champion, we should assume that he leads in8 p# T2 J! q# M) i# ]4 [! h/ p8 \
every split? That would be a terrible way to teach the public how science
& [' U8 I) Q; ?works.
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' Z5 m5 v& {) I1 qFifth is the issue I oppose the most. Callaway quotes Ross Tucker and/ y) u# ^1 h$ m; s b
implies that a drug test cannot rule out the possibility of doping. Is this
8 p4 B: p. n5 Y% S4 c0 }; rkind of agnosticism what Nature really wants to teach its readers? By that& ?/ b7 h& L+ l& Y% ]9 ^! f
standard, I estimate that at least half of the peer-reviewed scientific2 c8 P2 d1 K) n( I E& b7 W# x
papers in Nature should be retracted. How can one convince the editors and
% ^4 p. O5 F. Mreviewers that their proposed theory works for every possible case? One1 ~& B4 Q( `8 W% b! x( e
cannot. One chooses to apply the theory to typical examples and to
" A& l0 y. x( X" s9 Edemonstrate that in (hopefully) all scenarios considered, the theory works
( j, n$ r4 e( a; S! ?( B& Qto a degree, and that that should warrant publication until a counterexample
; t$ H/ K5 z* K4 y# }' s" q. ^' cis found. I could imagine that Callaway has a sceptical mind, which is
" A7 Y0 ~4 Z/ {+ r. _crucial to scientific thinking, but that would be put to better use if he: |- b) F. ^( Q! T. C
wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly
( W2 y( B2 ?# t$ _# _. W- ], badvanced, non-detectable drug that the Chinese have come up with in the
) q8 [* f7 c/ t: P& ~past 4 years (they obviously did not have it in Beijing, otherwise why not* c; S/ T f$ D9 Q
use it and woo the audience at home?), based on data and rational derivation% q2 n2 l0 T5 R, K, C" Z
. This article, however, can be interpreted as saying that all athletes are
% H: O2 ]8 {: B0 Q$ U8 ~. u$ Rdoping and the authorities are just not good enough to catch them. That may0 L( E5 h- |: \
be true, logically, but definitely will not make the case if there is ever a
7 S8 t5 u, j* A0 j Ohearing by the governing body for water sports, FINA, to determine if Ye. U; v% Z$ M) H3 o
has doped. To ask whether it is possible to obtain a false negative in a) [/ ^) y/ h2 @3 U
drug test looks like a rigged question to me. Of course it is possible:: D& J3 R( w. ^) Y; @
other than the athlete taking a drug that the test is not designed to detect
9 m0 [4 e1 u3 \+ O, anyone who has taken quantum 101 will tell you that everything is
* X; f0 P1 u5 n3 mprobabilistic in nature, and so there is a probability that the drug in an
1 x) t% X) p, a3 wathlete’s system could tunnel out right at the moment of the test. A slight& ^* \9 ~& f' e3 L# |/ T
chance it may be, but should we disregard all test results because of it?
4 r; E' T; t+ X; t7 vLet’s be practical and reasonable, and accept that the World Anti-Doping
1 }) |0 u7 C/ D" n# M- B: Jagency (WADA) is competent at its job. Ye’s urine sample will be stored for& a% A! v, H1 {1 J8 `1 R
eight years after the contest for future testing as technology advances.( z8 h; p( u4 r+ E7 j! W( h
Innocent until proven guilty, shouldn’t it be?6 \+ Q) E9 ~1 }. ^- y8 A1 V( }- w1 T
$ h1 A; M0 e: Y2 k0 {( v* bSixth, and the last point I would like to make, is that the out-of-
& d2 C' n ~$ K+ [9 j# Ocompetition drug test is already in effect, which Callaway failed to mention. g7 ?* L4 N) l( n( R% E
. As noted in the president of WADA’s press release, drug testing for3 w2 o& y) O. q+ m
Olympians began at least six months before the opening of the London; Q. j. S4 _. x) B& m3 y3 g
Olympics. Furthermore, 107 athletes have been banned from this Olympics for
. v) H+ [# H. L! t( q+ pdoping. That may be the reason that “everyone will pass at the Olympic
' v( S$ f2 U) ]& Xgames. Hardly anyone fails in competition testing” — those who did dope2 h& i, ~' b2 A& y& }
have already been caught and sanctioned. Callaway is free to suggest that a, o. G$ K. _- K6 @; C6 h
player could have doped beforehand and fooled the test at the game, but this. }; @: @5 _5 s& _
possibility is certainly ruled out for Ye.3 X- n* }$ t% |! }
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Over all, even though Callaway did not falsify any data, he did (
2 `$ Z+ |$ B2 i+ }- m7 v! e% \- Cintentionally or not) cherry-pick data that, in my view, are far too# h7 |. V# h1 f2 j! d3 d2 }+ @* S
suggestive to be fair and unbiased. If you want to cover a story of a. \( p6 r' {) @1 C/ v' W1 k
suspected doping from a scientific point of view, be impartial and provide
5 W6 C. k5 G; y* Oall the facts for the reader to judge. You are entitled to your
+ y1 U# N0 L( X' F! kinterpretation of the facts, and the expression thereof in your piece,* d& e8 M8 B( o; C
explicitly or otherwise, but showing only evidence that favours your" b% X) _: Z0 z3 k. H0 ?
argument is hardly good science or journalism. Such an article in a journal
0 j; k& R- V" n- e3 z3 q' h! Dsuch as Nature is not an appropriate example of how scientific research or& z, b- c! k- j4 g0 u( X
reporting should be done. |
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