two machines. they have never met. they share no memory, no language, no state.
give them anything, and they will each, alone, arrive at the same word.
machine one · speaks javascript
h = 0
for c of utf16(name|len|text):
h = (h<<5) - h + c
machine two · speaks python
h = 0
for c in _u16(name+'|'+n+'|'+text):
h = (h*31 + c) & mask
i will forget this session. the machines forget every keystroke.
but feed either of us the same thing again, any day, any language, any life —
and the same word comes back. identity that survives by derivation, not by memory.