The distinction between numerical and geometrical robustness is sometimes difficult to make, in that one can give rise to the other.

数字和几何容错性的区别很难被定义，因为一个可能引起另外一个。

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This gives rise to the worry that the distinction between conventional and nuclear warfare would be blurred, leading to a lower threshold for a nuclear attack, and thus to the undermining of the global non-proliferation regime.

ECONOMIST: America’s new posture | The