-The brain as ncc (neural correlate of consciousness) to understand something.
-'Retrodictively': most, if not all, scientific researches are predictive: grounded on tests and empirical observations you are able to predict something. 'Retrodictive' (my own term) is just its reverse.
-The first humans: you may choose between (a) evolutionary (see e.g. the psychozoicum of Erhard Oeser c.s.), or (b) creationistic (see e.g. Genesis chps. 1 through 3): it is up to you.
-Is this search possible?
Thanks for your answer! Marc.