alt Hacker NewsThat doesn’t in any way invalidate that bread is sold sliced. That is the assertion, that sliced bread is available for sale. Even in places where bread is typically sold unsliced, the concept of sliced bread exists.
Or are you claiming that you are completely unaware of unsliced bread and need a citation to verify its existence?
Would it be appropriate for the Wikipedia article on "milk" to mention that it's sold frozen, unqualified, simply because that has happened?
Bread is usually sold sliced in some places, and usually sold unsliced in others. For a claim about this to be useful for wikipedia it should be specific and cited.