Translation:That is not an apple, and this is not a chair.
This always reminds me of the Surrealist Magritte's piece: "The Treachery of Images ", also known as n'est pas une pipe. I believe there is an artwork in this sentence.
Your sentence speaks about one object. The sentences above speak about two separate objects. One of them is not an apple, and the other one is not a chair.
Mmm i didn't have "and" in my choice of words so i had no way if expressing "pedig" the only close by word was "or" and with "or" the sentence was meaningless