Your comment and the parent comment are both completely full of shit. Columbus knew exactly where he was going and all educated people of Europe already knew the earth was round hundreds of years beforehand.
You seem to have been stuck on some themes that I have not even addressed. I never talked about 'round world' theory. Columbus had no idea he was going to land on the West Indies, he thought he was going to find a faster way to the spice lands. That was his intention, he didn't think he was going to discover any new land. Unless you think they somehow divined that considering only perhaps the Vikings may have found the new world. So to wit, Columbus decided to go a different direction to get to India and ended up discovering the West Indies.