Negation in natural language "In every supermarket, if we can buy fish then the supermarket has a refrigerator" Is the negation of this sentence 1) There exists a supermarket where we can buy fish and it doesn't have a refrigerator or 2) There exists a supermarket where if you can buy fish, then the supermarket does not have a refrigerator.

1 is correct. 2 is wrong because it is already satisfied if there is a supermarket where you cannot buy fish.