Given a negotiation between two participants, answer 'Yes' if both participants agree to the deal, otherwise answer 'No'.

THEM: can i have ball and 2 hats? YOU: yes to the ball and even a book, but i must take umbrage at relinquishing any of the hats THEM: book is 0 for me. how about ball and 1 hat? YOU: it is not ideal but a reasonable request and i will agree THEM: thanks.
Yes