Now the funny thing is that Sarah Brosnan, who's been doing this with chimpanzees, had a couple of combinations of chimpanzees where, indeed, the one who would get the grape would refuse the grape until the other guy also got a grape.
Agora o chiste esta en que Sarah Brosnan, que leva fai isto mesmo con chimpancés, tiña unha parella de combinacións deles onde, sen dúbida, aquel que recibía  a uva refugábaa até que o seu compañeiro obtivese unha.