2 + 2 = 5, but only after one redefines axioms and definitions to force that square peg into a round hole.
At the end of the day, though, one would still end up with the same concept, even if the method used to express that concept is different.
So, while it's true that if one, say, swaps the definitions of "4" and "5" to make 2 + 2 = 5, one hasn't actually changed anything in any meaningful way. Reality stands unbowed.
2 + 2 = 5, but only after one redefines axioms and definitions to force that square peg into a round hole.
At the end of the day, though, one would still end up with the same concept, even if the method used to express that concept is different.
So, while it's true that if one, say, swaps the definitions of "4" and "5" to make 2 + 2 = 5, one hasn't actually changed anything in any meaningful way. Reality stands unbowed.