Leonard said:
This would mean that one couldn't be considered on conscious entity, but a holder of counscious entities which only exist for a moment before they are replaced.
I think that might be stating things too strongly. It depends on what you mean by 'consider' and 'entity.' For most purposes, there's not really any harm in considering ourselves as single conscious entities, if you mean by that thinking of ourselves
as if our consciousness really were a continuous, temporally extended thing rather than a series of such things. It's actually quite useful to make that assumption in most walks of life, except perhaps in scientific/philosophical discussions like this one where we're most concerned with truth rather than utility. Also, even if the 'single consciousness' view is not strictly true, it might be a good approximation to the truth, like a smooth, continuous line can be a good approximation to a jagged line composed of many tiny line segments.
There is also the issue of what relationship obtains between personal identity and phenomenal consciousness, and what exactly is meant by "conscious entity." Personal identity does not pick out one's moment-to-moment conscious life per se, so much as it picks out one's personality, history, skills, etc. I think the word "entity," when used to refer to humans, refers to something like one's personal identity. So to say that a person P is a conscious entity is to say that P has some identity that demarcates P as a particular human being, and also to draw attention to the fact that P has conscious experiences.
In other words, I think in most cases the word "entity" is used to refer to more than just the totality of one's conscious experience at any particular moment, so I don't think the qualification about multiple conscious entities you endorse is needed. I understand what you're getting at, but perhaps you could use a more precise and appropriate word.