The values of pulse, breathing, and alive will be either 0 or 1, representing false and true. Thus, if this neuron is given the values (0,1), (1,0) or (1,1), it should output 1, and if it is given (0,0), it should output 0. The neuron does this by applying a simple mathematical operation to the input - it adds whatever values it has been given together, and then adds its own hidden value, which is called a 'bias'. To start with, this hidden value is random, and we adjust it over time if the neuron is not giving us the desired output.