I paraphrased incorrectly, but not in a way to alter the truth of the observation, "No amount of experimentation can ever prove me right, one single experiement can prove me wrong" -Albert Einstein
In principle, yes. In practice, scientists are every bit as hidebound as witchdoctors...and that includes Einstein. No body forced him to come up with the "cosmological constant." Again, see my short list for empirical evidence.