the technology we create. Consider shoes again. A recent experiment asked people to draw a shoe for the benefit of the computer. Since most people drew some variation of a sneaker, the computer – learning as it went along – did not even recognize a high-heeled shoe as a shoe. This problem is known as ‘interaction bias’. But ‘interaction bias’ is not the only type of bias about which Google are worried. There is also ‘latent bias’. To illustrate this, consider what would happen if you were training a computer to know what a physicist looks like and in order to do so you showed