The first time I heard about flat earth I thought "obviously not true but I gotta hear this" 2 years later I'm still in it and still learning how we know what we believe is true. I've found nothing to support flat earth but now I know how we "know" what causes gravity, we "know" the earth spins lots of things like that and almost every one of them you yourself can do the experiment. I've watched flat earthers do many of these experiments on video and deny what they see, while other flat earthers will still insist these experiments have never been done.