Theroy to me is a way to quantify or classify something or someone that to your knowlage your not sure about yet. But the scientific definition also applies in my book. So in some way i go both ways.
Hell i've come up with sevril theroies if not trying to find something to explain them. So yeah, i can agree with "extrodanary claims require extrodanary evidince." Regaurdless i still go for the quantum theroies due to there draw of a philosophcial nature in most cases.
The problem with that broken down record nonsense, is the potential for lies and assumptions to demand extra ordinary evidence for something that is actually simple or natural, ends up causes the wrecking havoc on proving the natural existing.
I find that Occam's Razor/Law of Parsimony fails because most people don't quite understand the context of "simplest" in this case. Often falling on "God did it" being the 'simplest' answer but not understanding that it has no explanatory power.
With Sagan's quote you have a clear definition of what one is trying to achieve. In simpler terms "put up or shut up" in that everyone can understand.