I guess I may be behind the times on some of these AI efforts, but I'm guessing that the model involves a big black box blob of data. I'd be interested to know

I guess I may be behind the times on some of these AI efforts, but I'm guessing that the model involves a big black box blob of data. I'd be interested to know how models evolve with additional training, and wonder if there are additive identities that would allow two separately trained models to be combined.