where do you want to apply (which field/area ) and this exactly the confusion, technology/algorithm is are there for to solve most problem, the question is very fundamental as matter of fact this is proven that linear aggression could solve 80% of it existed for almost three centuries, it not that i am not open for many, for NN you really a lot quality training data, FB , twitters are ok you have large data but it is like mess and proven that any use out side social "thing" you can go ake that EAI , but how worthy and NN are still theories at large