I just wish that someone would have a sure answer, so that I would not have to think about it.
I have a number of instructors. They teach on different days. One day, one man demands that we punch vertically, the other day another instructors wants us to punch horizontally. I don't particullary think it's good for our training.
However, I thought the point of punching vertically is to use the whole fist.
But if you wear gloves than you don't need to punch with two top knuckles. And I thought the point of horizontal punching was to hit with two top knockles. So in my oppinion if you wear gloves you might as well hit with a vertical punch. I mean Karate gloves of coarse, not boxing gloves.