Every woman knows what I'm talking about. It’s the presumption that makes it hard, at times, for any woman in any field; that keeps women from speaking up and from being heard when they dare; that crushes young women into silence by indicating, the way harassment on the street does, that this is not their world. It trains us in self-doubt and self-limitation just as it exercises men’s unsupported overconfidence.

Yes, people of both genders pop up at events to hold forth on irrelevant things and conspiracy theories, but the out-and-out confrontational confidence of the totally ignorant is, in my experience, gendered. Men explain things to me, and other women, whether or not they know what they're talking about.

The battle with Men Who Explain Things has trampled down many women — of my generation, of the up-and-coming generation we need so badly, here and in Pakistan and Bolivia and Java, not to speak of the countless women who came before me and were not allowed into the laboratory, or the library, or the conversation, or the revolution, or even the category called human.

If it’s not clear enough in the piece, I love it when people things to me they know and I’m interested in but don’t yet know. It’s when they explain things to me I know and they don’t that the conversation goes awry.