so take away the issue of life/death and instinct. you need to know what the bus is if you want to board it. if i was on this bus before, i recognise it as the thing i was on before, and know i can get on it. if they paint it or put a different ad on the side or that bus broke down and they replace it with a different model, i will not recognise it, and not get on it (and then miss work and be fired!)

also, i don't think of it as a bus, but when i want to communicate about it to you, i must translate as one might with a foreign language.