The view of the " behaviourists" is that nothing can be known except by external observation.

“行为主义者” 的观点是，除了通过外部观察， 什么都无法知道。

Thus, so far as knowledge of detached facts is concerned, the advantage is on the side of self-knowledge as against external observation.

因此，就独立事实的知识而言，与外部观察相比，自我知识更有优势。

It has seemed to the behaviourists that similar methods can be applied to human behaviour, without assuming anything not open to external observation.

在行为主义者看来， 类似的方法似乎可以应用于人类行为， 而无需假设任何不对外部观察开放的东西。

I do not myself believe that the analysis of knowledge can be effected entirely by means of purely external observation, such as behaviourists employ.

我本人不相信知识的分析可以完全通过纯粹的外部观察来实现， 就像行为主义者所使用的那样。

And the question whether we can know most about the psychology of human beings or about that of animals turns upon yet another, namely: Is introspection or external observation the surer method in psychology?

而我们是否最了解人类心理或动物心理的问题又转向了另一个问题，即：内省或外部观察是心理学中更可靠的方法吗？