Lukas Birk...

X=Y - ID cards series & performance of personalities (ongoing project)

i·den·ti·ty - /aɪˈdɛntɪti, ɪˈdɛn-/ plural identities

- the condition of being oneself or itself, and not another: He doubted his own identity.

- condition or character as to who a person or what a thing is: a case of mistaken identity.

- the state or fact of being the same one as described.

- the sense of self, providing sameness and continuity in personality over time and sometimes disturbed in mental illnesses, as schizophrenia.

- exact likeness in nature or qualities: an identity of interests.

- an equation that is valid for all values of its variables.