I've thought that science was a systematic collection (or understanding?) of knowledge. Which, to me, means a total degree of repoducibility. As in, if I have the collection of knoweldge to allow me to have this fact, then I can recreate this fact by following the same line of knowledge.
So, I am ignorant of many things but based on this definition I have problems with, political science, social science and definitly economic science, based on beyond anything but the most simplistic point. Political science, different political views exist, but the end point may be the same. Social science, a person born into poverty may have a worse life outcome than someone who isn't; but not always. Economic science - spend more than you earn you go broke, no seems to learn from that. Maths: 2+2=4; no matter how often you try it.
Cindy