wants to if a neuron has zero activation there's just no signal but if a neuron has a high activation it spikes a lot if has a low activation it kind of spikes sometimes well what he can do is negative spike right like zero is as low as it goes so the the thought that there are signed information in in the backward pass is inconceivable even if you have something like a second so you can imagine here instead of this backward connection because of the symmetry problem we have some kind of second neural network that goes in this