if the issue is of having conscious awareness, the logical brain is not necessary for such.
our society has a habit of being very highly dominated by the left brain, but consciousness is possible even in delta deep sleep.
the goal of the yogi is to be able to be conscious and aware in all states of mind, and therefore to transcend the very narrow and fickle walls of the logical ego brain [a brain which dissipates very quickly even in the lightest stages of sleep]
so, animals are not very logical, even very intelligent ones like monkeys, but they are conscious right?
if you try to keep thinking as much as you can while falling asleep, you hit a state where you just can’t remember anything you were thinking about at all, and yet, you are still in that state of mind, aware of it.
this is the barrier which the logical brain cannot cross, and hence why for most people sleep and dreams are unconscious experiences. but it is a bridge that YOU can cross if you expand beyond the confines of critical structured thinking.
put another way, the thinking brain is only a ghost of what is going on in deeper subconscious states of processing.
thoughts are delayed reactions, anchors for the ego to hold on to to create a sense of relevance to the moment at hand. actually before a thought comes there is the pure event that sparks it. if you lose your keys you might not think “oh man i lost my keys” for a few moments after it. the thought is a delay and serves to anchor your ego to the activity of key finding.
you don’t need a thought at all though, you can be aware you lost them without thinking a single thing.
this is sort of how dreams are. they are the formation of all sorts of random daily impressions given meaning, it is just that the meaning given cannot make sense rationally often.
if there is a troubling fear emotion and this fear is generalized to british nannies, german shepards, and pie you may have a completely illogical dream about a dog wearing a dress serving you pie which nonetheless makes sense, since the dream is just about your fears.
hope this helps