Dualism remains possible until we can explain how a conscious volitional thought migrates down the nervous system and activates a muscle or gland. We might question consciousness, volition, or thought, or all three, but consciousness, especially self-consciousness seems a given.
As long as there is knowledge, there is always the "possibility" of a dualism. That is why Plotinus long ago decided that knowledge was excluded from the One. Your statements suggest some affinity to monistic views.