Started an argument with my much smarter wife because she said North and South America are not two separate continents. She was right, because continents are only defined by convention.
Regardless of which definition you go with, someone saying North and South America are one continent but Europe and Asia are two separate continents are at the very least being inconsistent
There's two definitions in my language. One for land mass continent (eurasia) and the other is more of a geopolitical continent if that makes sense (europe, asia)
I'm of the unpopular opinion that India/Pakistan should be its own continent and New Zealand should be different continent then Australia. Both because they are different techtonic plates.
I remember many years ago I was playing WoW and the conversation in guild chat was about continents so I said that in my country America is a single continent. That moment an American in guild flipped the fuck out and got really mad at me even suggesting that his great country could be in the same continent as mine (Brazil) going as far as saying "that's so fucking dumb, next you will say Europe and Asia are the same continent?!" which is funny cause eurasia is a thing, what a dumbass.
You were right too, because continents are only defined by convention. And by the convention I was taught, there’s 3 Americas: South, Central, and North.
Eurasia and Oceania sure, quibble all you like that makes sense to me. But combining the Americas and pushing Africa in with Asia makes no sense to me.
I once tried to find a definition of "subcontinent", but all I found was that its almost solely used for India and sometimes for dividing North and South America into to two American subcontinents.