Science doesn't really deal with "concrete proof", it deals with "evidence". We've seen the evidence for evolution in this thread, what evidence for ID have you seen presented?
Let me rephrase....All I have seen from the pro evolutionists are hypothesis not yet empirically verified as law but accepted as the basis of experimentation.... The ID folk present the same argument...they accept the hypothesis of ID as the basis of experimentation. In the ID case the experimentation comes in the form of observation that nothing found on this planet creates itself hence there must be a creator. One view has as much validity as the other in my opinion since nither can be emphatically proven nor disproved.
The creationists are honest enough to admit this while the evolutionists are not.