Oh come on. For atoms and the shape of the earth, you know perfectly well I was referring to the contemporary ideas. And as far as argumentation goes, there wa

Oh come on. For atoms and the shape of the earth, you know perfectly well I was referring to the contemporary ideas. And as far as argumentation goes, there was a lot, but then it got settled. Ditto for nerve cells. In each of these cases, the argumentation was because there wasn't enough empirical data to decide the matter. But then more empirical evidence got collected and the truth became clear. The fact is, while scientists sometimes talk about nothing being really proven, in practice they believe an enormous and ever-expanding number of ideas actually are.