Cultural evolution is an evolutionary theory of social change. It follows from the definition of culture as "information capable of affecting individuals' behavior that they acquire from other members of their species through teaching, imitation and other forms of social transmission
Duplicity has largely negative connotations as the word is associated with being deceitful or "double-dealing" this could mean making a deal and then backing out at a later date or saying that you will do one thing and then later do something different.
the answer is: We had seen an elephant!
