Who are these people in my dreams? And when I become lucid and ask them questions (where are we?) why do they appear to be at a loss for words. Do they not know, or do they not want to tell me?

Why are the people in my dreams sometimes the same people I meet in "waking" life? When they are the same people, why can't I go ask the person in waking life about the dream we had together, why don't they remember it too?

Because, it's all bits from your mind amalgamated together in a semi-cohesive narrative.

Scientifically, we really know very little of dreams. I guess you're asking; why don't we seem to experience dreams as objectively as we experience waking life?

Here's my view on this: I really don't know, but I can conclude 2 possibilities.
1) Dreams are allways shared, objective experiences, just like waking life, except
we don't allways experience them all that consciously. Thus maybe a dreamcharacter
of someone you know from waking life, may actually BE that person in the dreamworld,
but they might not remember this if during that time their awareness was too low.

OR

2) Dreams are subjective experiences. Nothing, including your own body, is objectively real.
Instead your body, your Dreamcharacters & the enviroments are mental projections; A
virtual reality experience created realtime by your mind. Thus Dreamcharacters are also
be projections of your mind and will not be the actual person from the waking world they
look like. Then, this is why the actual person will not remember: He/She and his/her
Dreamcharacter aren't 1 and the same: The Dreamcharacter is just an imagination of your
own mind.


For now I don't really prefer 1 theory over another. I don't really know how to prove or disprove either of these theories either. Still, interresting to contemplate.