I think by that definition you can argue that all the entities I mentioned in my original comment are conscious.

There is no way to quantify how expressive your model of the world has to be, or what mechanisms you have to act.

For example, a single neuron in an artificial neural network has a model of the world (it's weight), and can act by producing different outputs for different inputs.

I think it means that consciousness isn't anything terrifically special and that human level consciousness is just something along the same spectrum with a more complicated model.