PM looking at Concept Design: "There were checkboxes and now you have radio buttons"

Me: "Those are two separate screens. One is the user inventory, the other populates an add"

PM: "So which is it? Are we using checkboxes or radio buttons?"

Me:"...both? Each where it makes sense?"

PM: "So what's the point of the radio button? If the user can only click one row, why do we need a radio button?"

Me: "Visual representation of what they selected. We could use row highlighting as well, it doesn't really matter"

PM: "But what's the point?"

Me:"...."