is the tools to distinguish between the two.

区分这两者的工具
On the face of it immediately,

首先面对的
the ability to read maps, the claim that that has a biological--

看地图的能力有生物基础的观点
that differences in that ability have a biological root is crazy.

说这个能力差异有生物基础是疯狂的
On the other hand, the claim that one--

另一方面说
that males may develop a trait not because it's advantageous

男性发展出某种特征不是为了其优势
but to attract females is less crazy.

而是为了取悦女性就不那么疯狂了
The telepathic stuff is really crazy but--;

精神感应这方面确实很疯狂
So, I'm not at this point--

所以我在此不就再多说
We're going to devote a lecture to sex.

我们会有一整节的课来讨论性别
I do not, at this point, want to make any claims one way or another.

我现在并非要发表什么观点
But what I want to suggest is that from a biological point of view

我想说从生物学的角度来看