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