However, those biases come in part from our experience. People subconsciously assume that a woman won't make a good engineer (for example), because when they pi

However, those biases come in part from our experience. People subconsciously assume that a woman won't make a good engineer (for example), because when they picture the engineers that they've met, the overwhelming majority are male. So to change those attitudes, one of the things you need is to make the numbers more balanced.