Can AI know your gender based on your Tweets?

Why is this an important question? Ultimately this is a stepping stone to answering the ethical question: Should we teach Artificial Intelligence to detect your ethnicity? This is an analogous question to If we had complete discretion, would we teach our children to recognize someone's ethnicity? As the creators and users of these tools, it is our responsibility to regulate AI in a similar manner to how we enforce seat belts and speed limits. On the pathway to AI ethics, we can first explore AI's ability to predict your gender simply based on text. We will not use voice nor facial recognition because that would be too easy.