24. The system of claim 1 , further comprising: one or more sensors to sense physical characteristics of the first authoring user and the second authoring user, the first inference data and the second inference data derived based, at least in part, on the sensed physical characteristics of the first authoring user and the second authoring user.
24. The system of claim 1 , further comprising: one or more sensors to sense physical characteristics of the first authoring user and the second authoring user, the first inference data and the second inference data derived based, at least in part, on the sensed physical characteristics of the first authoring user and the second authoring user. 28. The system of claim 24 , wherein said one or more sensors to sense physical characteristics of the first authoring user and the second authoring user, the first inference data and the second inference data derived based, at least in part, on the sensed physical characteristics of the first authoring user and the second authoring user, comprises: a functional magnetic resonance imaging (fMRI) device.