Look at the generalist's source code to make sure it's coherent and original. It's not a problem if they use something online as a model, especially when they're unfamiliar with an API or something, as long as they understand what they're doing. Also, good generalists tend to be more prolific when it comes to entrepreneurial endeavors, so look for a bunch of original side projects. What's most important with a generalist is his creativity and ability to learn a new technology. How he does this is not really important as long as he can do it. But originality in side projects probably indicates a desire for originality in code as well.