“很多物理学家都非常不为这些断言所动的原因在于它可以使因果关系本身很成问题，”盖利森说。

"The reason a lot of physicists are very unmoved by these claims is that it could make causality itself very problematic," Galison said.

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这并不是说“和平墙”是他们贫困的主要原因，要理清贫困人口与“和平墙”的因果关系几乎难以做到。

That is not to say that the barriers themselves are the main cause of poverty; unpicking the tangle of cause and effect between demographics and peace lines is probably impossible.

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