“Data science done well looks easy – and that is a big problem for data scientists. The really tricky twist is that bad data science looks easy too. You can scrape a data set off the web and slap a machine learning algorithm on it no problem. So how do you judge whether a data science project is really ‘hard’ and whether the data scientist is an expert? Just like with anything, there is no easy shortcut to evaluating data science projects. You have to ask questions about the details of how the data were collected, what kind of biases might exist, why they picked one data set over another, etc. In the meantime, don’t be fooled by what looks like simple data science – it can often be pretty effective.” Jeff Leek ( 17.03.2015 )