The Logic Trap of Knowing Identities
You can fall for a logical error simply by assuming you know everything about someone. Just because you don't recognize a person behind a mask, it doesn't mean they are not the same person you know perfectly well.
This philosophical trick highlights how our limited information can distort our grasp of reality. If you believe you know your father but claim not to know a masked man, you might mistakenly conclude they are different people. This ignores that the masked man is defined by his identity, not just your current perception of him. It serves as a reminder that what we believe about an object is not the same as the object itself.
Source: Masked-man fallacy