1. A system, comprising: an inference data acquisition module configured to acquire inference data including a first inference data that indicates an inferred mental state of a first authoring user in connection with a particular item of an electronic message and a second inference data that indicates an inferred mental state of a second authoring user in connection with the particular item of the electronic message; and an inference data association module configured to associate the first inference data and the second inference data with the particular item.
10. The system of claim 1 , wherein said inference data association module configured to associate the first inference data and the second inference data with the particular item comprises: an inference data inclusion module configured to include into the electronic message the first inference data and the second inference data into the electronic message.