https://techcrunch.com/2018/02/27/ibm-watson-cto-rob-high-on-bias-and-other-challenges-in-machine-learning/

For IBM Watson CTO Rob High, the biggest technological challenge in machine learning right now is figuring out how to train models with less data. “It’s a challenge, it’s a goal and there’s certainly reason to believe that it’s possible,” High told me during an interview at the annual Mobile World Congress in Barcelona.

With this, he echoes similar statements all across the industry. Google’s AI chief John Giannandrea, for example, also recently listed this as one of the main challenges the search giant’s machine learning groups are trying to tackle. Typically, machine learning models need to be trained on large amounts of data to ensure that they are accurate, but for many problems, that large data set simply doesn’t exist.