Neuronal transmission involves a conversion from electrical to chemical signals between neurons, which then re-sparks an electrical signal.

“the answer is because it was just an electric boot signal you know we'd be a box of wires and a box of wires without the weight between individual signals between the wires is a useless box because we don't understand or we cannot understand how to construct a Learning Network between these a box of wires whereas we can understand how we can construct a Learning Network between electrical and chemical stimulation because we can modulate the strength of that chemical simulation such that we can really actually learn a process”