Re: Can Data only receive order from Riker (& up) ?
That raises an interesting question. Do officers in the military who are doctors get referred to by their rank or simply as Dr.?
M*A*S*H would be a good guide on this. It depends how gung-ho the particular officer is.
Are they in it to be a doctor or military?
Maybe less "military" in 24th century Starfleet though.
Rimmer, on what period of history to live in-
“Well, It’d be the 19th century for me, one of Napoleon’s marshals.
The chance to march across Europe with the greatest general of all time and kill Belgians” - (White Hole).