Is it possible to truly know someone, or do we only know the version they allow us to see?

In General though relationship whether is platonic or romantic. for me I think humans are complicated we can change but with someone you have know along time you can understand them and guess patterns but can't still fully know them
Is it possible to truly know someone, or do we only know the version they allow us to see?
Is it possible to truly know someone, or do we only know the version they allow us to see?
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