9. The apparatus of claim 1 , wherein the first information indicates directed edges in the argument graph, said edges indicating which third node of the nodes provides an argument for another node of the nodes, which fourth node of the nodes provides an assumption for another second node of the nodes, and which fifth node of the nodes provides a challenge to another third node of the nodes; wherein the second information indicates text or data associated with the nodes; and wherein the node to be rated is rated as established (i) in a case when each incoming assumption edge thereof originates at a given established node of the nodes and no incoming challenge edge originates at a given established node, and (ii) in a case when at least one incoming argument edge exists, at least one of the at least one incoming argument edge originates at a given established node of the nodes.
9. The apparatus of claim 1 , wherein the first information indicates directed edges in the argument graph, said edges indicating which third node of the nodes provides an argument for another node of the nodes, which fourth node of the nodes provides an assumption for another second node of the nodes, and which fifth node of the nodes provides a challenge to another third node of the nodes; wherein the second information indicates text or data associated with the nodes; and wherein the node to be rated is rated as established (i) in a case when each incoming assumption edge thereof originates at a given established node of the nodes and no incoming challenge edge originates at a given established node, and (ii) in a case when at least one incoming argument edge exists, at least one of the at least one incoming argument edge originates at a given established node of the nodes. 10. The apparatus of claim 9 , wherein the processing device is further configured to: receive third information indicating which of the nodes is a citation node, and wherein a sixth node of the nodes is only rated as established when the sixth node is a citation node or has an incoming argument edge originating at a given established node of the nodes.