1. a mutualknowingness, a mutual postulatingness towards certain end products. (SHSpec 71, 6110C25)2. two or more people making the same postulatesstick. (SHSpec 62, 6110C04)3. ability to co-act with or mimic or be mimicked by. (5303M24)4. a specialized consideration, it is shared in common, and this we call an agreement. (5702C26)