[zo1]

Libertarianism is actually quite an open definition. E.g. I find it easier to describe myself as one, even though I'm technically an anarcho-capitalist.

It's the same if you try look up concepts such as Marxism, Democracy, Mercantilism, Capitalism, Left vs Right, etc. At the end of the day, you need to find someone that can distill the concepts for you to something more easily digestible.

Personally for me, there really is only one consideration to clarify the position. Does the person support the Non-Aggression Principle universally? If yes, then they're an anarcho-capitalist, if "almost-completely" or something like that, then they're fence-sitting near the libertarian position. And if they say no, then they're definitely a Statist (Whether that is democracy, marxism, socialism, or monarchy, doesn't matter).