I am trying to solve the transfer function of a circuit. I noticed in the explained notes provided by the teacher, he deduced certain IV characteristics using KCL. The KCL on the node attached to Vout did not consider the output current running to Vout, and instead only incorporated the currents of the remaining three wires attached to that node. Why is this? Do you disregard when calculating transfer function that there is current running to Vout?