All scientific theories can be 100% prooved by working backwards.
Take an insect, put him in blender, put the resulting homogenous biochemical soup in a container, create condiitons the same as the primordial soup and wait and see what happens. Nothing will happen.
Take the same insect, suffocate him to keep him intact. Put him in a jar and wait to see what happens. Nothing will happen.
In the first experiment you had all the building blocks for life in a random pattern. Did life spontaneously start?
In the second experiment you had all the building blocks for life in a highly organised pattern. Got a jump on evolution. Did life spontaneously start?
You are probably saying "what a stupid experiment", well that is the very basics of the evolution theory in nut shell.