 Our algorithm converges robustly and exactly to the correct backpropagation gradients, requires only a single type of computational unit, utilises only a single backwards phase, and can perform credit assignment on arbitrary computation graphs.
<clarity>  Our algorithm converges robustly and exactly to the correct backpropagation gradients, requires only a single type of computational unit, utilises only a single backwards phase, and can perform credit assignment on arbitrary computation graphs.
 Our algorithm converges robustly and exactly to the correct backpropagation gradients, requires only a single type of computational unit, utilises only a single backwards phase, and can operate on arbitrary computation graphs.