It has been clear for a long time (e.g. Marvin Minsky's early research) that:
1. both ANNs and the brain need to solve the credit assignment problem
2. backprop works well for ANNs but probably isn't how the problem is solved in the brain
This paper is really interesting, but is more a novel theory about how the brain solves the credit assignment problem. The HN title makes it sound like differences between the brain and ANNs were previously unknown and is misleading IMO.
1. both ANNs and the brain need to solve the credit assignment problem 2. backprop works well for ANNs but probably isn't how the problem is solved in the brain
This paper is really interesting, but is more a novel theory about how the brain solves the credit assignment problem. The HN title makes it sound like differences between the brain and ANNs were previously unknown and is misleading IMO.