1 + 1 = 2 is an abstraction with no physical analogue, because no “1” physical object is exactly the same as any other “1” physical object. Therefor, an epistemic gap exists between the abstract model 1 + 1 = 2 and a physical analogue such as:
https://abs.twimg.com/emoji/v2/... draggable="false" alt="🍎" title="Red apple" aria-label="Emoji: Red apple"> + https://abs.twimg.com/emoji/v2/... draggable="false" alt="🍎" title="Red apple" aria-label="Emoji: Red apple"> = https://abs.twimg.com/emoji/v2/... draggable="false" alt="🍎" title="Red apple" aria-label="Emoji: Red apple">https://abs.twimg.com/emoji/v2/... draggable="false" alt="🍎" title="Red apple" aria-label="Emoji: Red apple">.

This epistemic gap exists between ALL scientific models and their physical analogue.