re -> https://emacs-china.org/t/emacs/12580/8

draft

Feynman 先生曾对这样的观点发表过他的见解

假如 A B 两种不同的理论能解释同一种物理现象,但是数学表达却不一样.从科学的的角度,是无法判定 A B 究竟谁对谁错. 




```

    A                     B                 E              (something else)
    .                     .                 .              .
    .                     .                 .              .
    .                     .                 .              .
    .                     .                 .              .
    ........................................................
                          .
                          .
                          .
                          .
                          .
                          .
                         \./
             +-----------------------+
             |                       |
             |                       |
             |   "Correct Way"       |
             |                       |
             +-----------------------+
 
```

Ref: [Feynman: Knowing versus Understanding](https://www.youtube.com/watch?v=NM-zWTU7X-k)

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## Back ground

The Mayans were able to calculate with great precision predictions,
for example, for eclipses and for the position of the moon in the sky,
the position of Venus, etc. It was all done by arithmetic. They
counted a certain number and subtracted some numbers, and so on. There
was no discussion of what the moon was. There was no discussion even
of the idea that it went around. They just calculated the time when
there would be an eclipse, or when the moon would rise at the full,
and so on. 

## I have an idea
Suppose that a young man went to the astronomer and said,

'I have an idea.'

Maybe those things are going around, and there are balls of something
like rocks out there, and we could calculate how they move in a
completely different way from just calculating what time they appear
in the sky’.

‘Yes’, says the astronomer,

‘and how accurately can you predict eclipses?’

He says, ‘I haven’t developed the thing very far yet’.

Then says the astronomer, ‘Well, we can calculate eclipses more
accurately than you can with your model, so you must not pay any
attention to your idea because obviously the mathematical scheme is
better’.

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