I doubt I've ever had a truly original thought, including about liberty. Really, liberty is very intuitive-- if you can get away from the anti-liberty brainwashing. It's just not that hard to understand, unless you try to not understand.
I've had some thoughts about liberty that I thought were original, only to find someone else had the same thought first (sometimes thousands of years before me). In fact, that happens every time I think I thought of something completely original.
And it's OK. It doesn't matter where a good idea comes from, it only matters that it spreads. I am happy to help spread good ideas, no matter who thought of them first. It's not about me, or any other individual (which seems odd for an individualist to be saying), it is about the ideas leading to the truth; to reality.