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 algo curioso é que Sarah Brosnan, que esteve fazendo isso com chimpanzés, observou algumas combinações de chimpanzés onde, de fato, a que ganha as uvas as recusaria até que a outra chimpanzé ganhasse uma uva.