Algorithm 2  Neuronal firing signal carrier; propagate a single signal thought for all possible nodes in the neural network graph recursively based on its position.

functionsignal_carrier($g,n,r,\mathit{bootstrap}$)

$s\leftarrow$get_inbound_signal($g,n,r,\mathit{bootstrap}$)

if $s=\mathit{None}$ then

return $\mathit{None}$

$s\leftarrow$apply_signal($g,n,r,s$)

if $s=\mathit{None}$ then

return $\mathit{None}$

set_outbound_signals($g,n,r,s$)

for all $\mathit{successors}\mathrm{in}g.\mathrm{node}\left(n\right).\mathrm{successors}\left(\right)$ do

signal_carrier($g,n,r,\mathit{None}$)