Hi! I wonder what "knowledge" is. I heard the JTB argument that says knowledge must be a justified, true belief. Then there is the Gettier problem in which JTB is not sufficient to describe knowledge. But I suppose, to say that "JTB is not enough for knowledge", one must have a definition of knowledge in the first place which is not "justified, true belief". So I was so curious what the definition of knowledge, about which philosophers have been discussing so long, actually is?