![](https://pbs.twimg.com/media/DgPbSBNUEAAvxDJ.jpg)
![](https://pbs.twimg.com/media/DgPb9NcWAAA8ut8.jpg)
![](https://pbs.twimg.com/media/DgPckLsWkAIo_4S.jpg)
![](https://pbs.twimg.com/media/DgPc3nhXkAUzHTS.jpg)
Approximate ideal experiment with observational data
6/N
![](https://pbs.twimg.com/media/DgPd7eHXUAAWOx8.jpg)
![](https://pbs.twimg.com/media/DgPeEZzXkAA09K1.jpg)
8/N
![](https://pbs.twimg.com/media/DgPenT1XUAETinZ.jpg)
9/N
![](https://pbs.twimg.com/media/DgPfGLIWsAAWJPA.jpg)
10/N
![](https://pbs.twimg.com/media/DgPfiAzXcAYDVNw.jpg)
11/N
12/N
![](https://pbs.twimg.com/media/DgPg1DTXkAAT3xb.jpg)
13/N
![](https://pbs.twimg.com/media/DgPhFyCXcAIvEvo.jpg)
14/N
![](https://pbs.twimg.com/media/DgPhmi4XUAABD4C.jpg)
![](https://pbs.twimg.com/media/DgPhmi7WkAY9ylU.jpg)
15/N
16/N
![](https://pbs.twimg.com/media/DgPijWvXUAAUN8B.jpg)
![](https://pbs.twimg.com/media/DgPiy6-WkAA2fuZ.jpg)
![](https://pbs.twimg.com/media/DgPi6lBXkAEKlNN.jpg)
![](https://pbs.twimg.com/media/DgPji4BW4AA4nSL.jpg)
![](https://pbs.twimg.com/media/DgPkK6wW0AAPyk8.jpg)
building on the observational research 21/N
![](https://pbs.twimg.com/media/DgPmuZVUcAAGKHE.jpg)
![](https://pbs.twimg.com/media/DgPm8ukU8AAkWOd.jpg)
![](https://pbs.twimg.com/media/DgPnhISXUAAS_Zp.jpg)
![](https://pbs.twimg.com/media/DgPnuIsW0AIqR14.jpg)
![](https://pbs.twimg.com/media/DgPn4kxWsAAvNfz.jpg)
![](https://pbs.twimg.com/media/DgPorBGU8AAO7mk.jpg)
27/N
![](https://pbs.twimg.com/media/DgPqDsGW0AAKqFh.jpg)
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