Tweeted By @fchollet

This is a great answer and I agree -- modelling/science is the hardest (if you want to do it right), and also the most time-consuming due to lengthy iterations. Meanwhile data collection and labelling is the most expensive, and often the most important to the success of a project https://t.co/xViIhZkg2D

— François Chollet (@fchollet) December 16, 2018