There might be real spaceships among all the UFO noise, but I doubt that an honest investigation will find it. When the visitors want us to know about them, we'll know.
Personally, I'd bet my life against a hundred bucks it ain't gonna happen in the next 30 years.
the point I wished to make was that science, as it stands now, does allow finding VALID instances of all of the above. The type of change Behe would have would remove the empirical standards.