The observable and emperical indicators are the expansion factor and cause and effect. While most of the greatest scientists agree with a finite universe, I am open to your astrophysists premises - enlighten me. That life and any action per se can only occur where more than one entity is available? This is of course manifest observable science. The latter is not even encumbent, it is so manifest. Consider any singular entity and nothing else: how can an action occur when interaction is not possible in this scenario? This becomes far more onerous when we speak of an original lone entity. It asks the Q: can 1 + nothing = 2 or something other than 1? Can a verb with no subject and object be a verb? Yes. Absolutely. A vert clear and simple definition, and one which crosses all borders - including life, inanimate bodies and natural phenomena: An indivisible and irriducable entity. Oxygen is a new product on earth - it was not there at the beginning of the earth. Water, like oxygen, are fuel factors ony, and their impact is wholly dependent on their attributes and interaction abilities. Water + stones do not produce life - if water existed on mars no life would result, even if we add nitrogen and carbon. A critical mix occured on earth, indicating only a focused impact in relation to the rest of the known universe.