I'm a firm believer that artificial intelligence will never happen, at least not human level intelligence. For it to occur a massive shift in the way computers think needs to occur.

Computers work in binary which is nothing more than 0's and 1's. Essentially all computer decisions are based on whether or not a switch's state is on or off, true or false, yes or no. This is not intelligence that's merely reasoning which is not intelligence per se.  Merely being able to reason on something based on a set of known facts is not intelligence as intelligence involves memory, thinking ability and imagination. Computers can't think, computers can't imagine, computers can't look into files and make decisions based on the information contained.