Well, I write a little something when I think about it, not that I have any really original thoughts.
Some posts will be opinion, some will be facts and some will be me writing things that somewhat resemble poety. Essentially, it is written for me, in a public forum. Sometimes I will have a different opinion later on, as I learn more about something.
The content is mine, protected by copyright.
ps. If I write about science I strive for accuracy and spend time fact-checking. In general conversations I try for a version of general truthfulness, not strict accuracy.