Central America, Which continent, North or South America?

People say there are only three countries in North America. Canada,USA and Mexico. I beg to differ. Looking at any map of South America, I have come to the conclusion that South America begins at the border between Panama and Colombia. Or am I mistaken? Where does that leave central American countries such as... show more People say there are only three countries in North America. Canada,USA and Mexico. I beg to differ. Looking at any map of South America, I have come to the conclusion that South America begins at the border between Panama and Colombia. Or am I mistaken? Where does that leave central American countries such as Belize and Guatemala? Serious answers please. Thanks.
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