I'm saying you're wrong. You never start going north again. It can't be done and never has been done. I'm saying that in reality, you will never get to the southernmost point. There is no real south pole, they go about halfway around the world from north to south according to what science says the circumference is and then call that the south pole. Then start heading back in the direction they came from. Nobody can ever do what you say happens.You start going south from anywhere on the "globe" and you will go south forever. Don't act like you get what I'm saying.
No, I get what you are saying. What I am trying to get you to see is a hypothetical. Do you know what that means?
I am saying pretend the globe model is correct for a moment. Your statement:
"from any place on the globe if you go south and keep going south you will never come back north again."
Is true because unless you turn around and go north, all you would do is end up at the south pole and stop moving, as any further movement from that point would result in a northerly direction of travel.
Now we will pretend the flat Earth model is correct, (another hypothetical for arguments sake). Your statement:
"from any place on the globe if you go south and keep going south you will never come back north again."
Is also true because again unless you turn around you will keep TRAVELLING south forever without stopping.
Therefore you need to word what you are saying differently in order for it to make sense. It is your grammar/English comprehension that is the problem here.