Imagination
What is it?
It seems to be a faculty that enables us to create mental scenarios or models of reality, especially as projections of what might take place in the future - a sort of mental time travel. Or it enables us to abstract from actual situations and arrange a version of reality in our heads. Saying that, I wonder if all our mental perception is merely imagination, since it is modified in various ways by each person according to their own mental apparatus, their capacities, life experiences and how these in turn have conditioned us to perceive reality in certain ways.
Do we share it with other animals or is it unique to the human species?
Why do we need it?
Why is it an advantageous feature?
What can go wrong when we use it? Does it need to be disciplined, tamed, by reason and logic?