Outside belief, I wonder how people could be absolutely certain about something which needs forever to prove, like polemic between the concept of 'free will' against 'predestination' amongst the scholars.
As long as we think that the animal races were lower than us and were not a form of civilizations, our minds will always reject to believe a concept of the existence of alien races which far more advanced than human civilization.
The concept of randomness and coincidence will be obsolete when people can finally define a formulation of patterned interaction between all things within the universe.