Whatever the seller guaranteed or stated as fact remains in force after the sale closes. After the closing, the buyer would retain the right to rely on the guarantees and statements of fact.

In other words, the buyers could sue the seller if the guarantees weren't honored, or if something the seller stated as fact turned out to be false, and the buyer suffered harm.

That's my non-lawyer opinion.

"All waranties and representation contained in the agreement shall survive the closing unless otherwise stated in this agreement."

Interesting statement. Here, it would be the other way around. There are no automatic items that survive the closing unless they are spelled out.
i.e. the air conditioning unit has 2 years remaining on it's warranty and shall transfer to the new owner at closing.

Strike the clause.