Reviews: Push-pull Feedback Implements Hierarchical Information Retrieval Efficiently

Update: I apologize for my confusion about the dynamics. I feel more positively now about this work, and have increased my score. There are two issues here to be addressed: a) how realistic is it for the dynamics of the feedforward pass recurrence within layers to run to convergence *before* sending down the top-down feedback? What happens if these are concurrent processes, such that units get both bottom-up and top-down inputs at the same time? Given the time-scale of the recurrent dynamics in cortex, the authors could then ask (in their model) whether this delay is "enough" for their push-pull mechanism to work. If yes, that would strengthen the result a fair bit.