Oh yeah absolutely you can use better structures even without hashing, I was just saying that a hash table isn't always an option. Lack of transitivity: you ca

Oh yeah absolutely you can use better structures even without hashing, I was just saying that a hash table isn't always an option. Lack of transitivity: you can still dedupe based on a transitive closure of whatever relationship I provide. It's easy if I want to dedupe numbers closer than 0.01 (using sorting) but much harder to do it efficiently for vectors.