> argues that cognitive sex differences influence performance in software engineering, but presents no supporting evidence

This is completely made up

At least a few psychology professors [seem to disagree with that assessment][1]:

> Graded fairly, his memo would get at least an A- in any masters’ level psychology course. It is consistent with the scientific state of the art on sex differences.

I'm sure you can probably find lot of opinions on both sides of the debate though, and that's fine. As the memo stated:

> Of course, I may be biased and only see evidence that supports my viewpoint. In terms of political biases, I consider myself a classical liberal and strongly value individualism and reason. I'd be very happy to discuss any of the document further and provide more citations

Instead of "discussing the document further" though, they fired him.

[1]: http://quillette.com/2017/08/07/google-memo-four-scientists-...