1. A system for capturing and managing knowledge from social networking interactions comprising: a presenting engine, comprising memory, to: present a marking element in a social networking interaction wherein: said marking element is a visual interface element that allows a user to mark a message of the social networking interaction with at least one of a question specifier and an answer specifier; said question specifier indicates that the user found a message to include a question; and said answer specifier indicates that the user found a message to include an answer; and present knowledge element indicators to accompany a corresponding message, which knowledge element indicators indicates whether said corresponding message corresponds to at least one of the group consisting of a question and an answer; a creating engine, comprising memory, to create a knowledge element in response to a user specifying a message of the social networking interaction to be a question and specifying another message of the social networking interaction to be an answer; a storing engine, comprising memory, to store said knowledge element in a catalog of knowledge elements; and a recommending engine, comprising memory, to recommend said knowledge element for use in response to a user composing a message relevant to said knowledge element in said social networking interaction before said user shares said message within said social networking interaction.