1. A system comprising: one or more processors; memory coupled to the one or more processors; an inference data acquisition module configured to acquire inference data including at least a first inference data that indicates an inferred mental state of a first authoring user in connection with a particular item of an electronic document 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 document; a comparison module configured to compare the first inference data with the second inference data; and a presentation module configured to present congruence data indicative of an extent of congruity between the inferred mental state of the first authoring user in connection with one or more first actions, that were performed at least in part by the first authoring user in connection with the particular item, and the inferred mental state of the second authoring user in connection with one or more second actions, that were performed at least in part by the second authoring user in connection with the particular item, based, at least in part, on the comparison of the first inference data with the second inference data.