But others think it is symbolic reasoning which is brittle, and that machine learning still has a lot of mileage left in it.

但也有人认为符号推理才是脆弱的，而机器学习还有很大的进步空间。

I thought that they'd go away for two or three years, because my intuition has always been that we needed to understand knowledge representation and symbolic reasoning in a more explicit way.

我以为它们会消失两三年，因为我的直觉一直是我们需要以更明确的方式理解知识表示和符号推理。