Alan Day
Definition for 'Yes'. No specific Legal definition according to Dictionary.com - http://www.thefreedictionary.com/yes yes (ys) adv. It is so; as you say or ask. Used to express affirmation, agreement, positive confirmation, or consent. n. pl. yes�es 1. An affirmative or consenting reply. 2. An affirmative vote or voter. tr.v. yessed, yes�sing, yes�es To give an affirmative reply to. interj. Used to express great satisfaction, approval, or happiness.
Regular definition for cooperate. No specific Legal definition according to Dictionary.com. Just 'See these words' - http://www.thefreedictionary.com/cooperate
The third definition is interesting though
co�op�er�ate (k-p-rt) intr.v. co�op�er�at�ed, co�op�er�at�ing, co�op�er�ates 1. To work or act together toward a common end or purpose. 2. To acquiesce willingly; be compliant: asked the child to cooperate and go to bed. 3. To form an association for common, usually economic, benefit: When buyers cooperate, they can make large wholesale purchases at a discount.