The true scientific discipline allows one to reach any conclusion, just so long as the evidence is the right kind required for the facts at hand. Twisting a theory when there is empiracle data against that theory is not the scientific discipline.
Since there is no proof to hand of the existence of ET, does not necessarily suggest that such proof does not exist, nor does it exclude that there is evidence for the arguement.
Since there is no proof to hand of the existence of ET, does not necessarily suggest that such proof does not exist, nor does it exclude that there is evidence for the arguement.