What is the halocha on eating chometz DURING THE YEAR, that was possibly not sold over Pesach?
Is it halachically ‘inedible’?
I’m not a Rov, but you said the word “possibly”, i.e. a Safek. Since Chametz after Pesach is a Drabbonon, we would apply Safek D’Rabbonon L’Kula. Furthermore, if it was not you yourself who owned the Chometz over Pesach, or if you did Bitul, there is further room to be Maikel, as there are many Rishonim who hold that The Gezairah of R’ Shimon doesn’t apply.
Ask your LOR for actual Halacha.