I agree with the overall thrust of your argument, but I disagree with this one somewhat:

> Therefore, based on Occam's razor, we may provisionally assume that all matter possesses some degree of consciousness -- this is the simplest assumption.

An even simpler first few steps:

* We experience matter, but we aren't sure if matter exists outside of our experience of it

* Therefore, based on Occam's razor, we may provisionally assume that all matter exists only within our consciousness -- this is the simplest assumption.