The knowledge is somehow there, as if a window had opened in the mind. There seems to be no way to gain more information. What I get is all there is. Another way to describe it is by relating it to your own experience. Try to imagine what your home looks like, or someone you know.
Premonitions are quite easy to ignore.
The fact that I admit the possibility of precognition does not necessarily mean that I believe in the supernatural. The human brain can, in certain individuals, perform extraordinary feats. Another gifted but autistic boy can produce architectural drawings in great detail from memory. Other savants have other specific gifts. A great deal of what we do in our daily lives depends upon a view of the future.