tokens: This contrasts with the first few decades of ML progress , when researchers had the luxury of focusing purely on the fundamental aspects of their work , not worrying too much about its potential societal impacts - an object recognition algorithm could be tested on a common dataset like MNIST lecun1998 or ImageNet deng2009 , and an objective performance metric would be obtained in order to measure progress , without having to think about the messiness and complexity of deployment and social impact .