Context: 'I can share water for firewood.' 'Optimally, I would like 3 food and 2 water which would leave you with 0 food, 1 water and 3 firewood. I think it will be easier if you also tell me your optimal wants then we can go from there.' 'We could each keep 3 food.'
Utterance: 'No, that won't work. There is only 3 total of food, water and firewood each.'