People from groups that are stereotyped as not good at something often suffer from Stereotype Threat (see Steele, Whistling Vivaldi). This happened to me recently. I was giving a talk I’d presented several times before, very successfully. But this time everyone in the room when I walked in was male (two women arrived eventually), and the walls were covered with pictures of male philosophers. (Apparently there was a woman, but she was behind me.) I found myself stumbling over words and feeling that my arguments were weak and my answers to questions were feeble. I knew enough about stereotype threat to know that was what I was encountering, but this knowledge didn’t help.