The above outline is simplified in that it neglects certain subtleties of discourse and context. A sentence or other utterance type generally involves both new and old (given, presupposed) information, and furthermore, some of the concepts involved may be more strongly focused than others. For example, in the sentence “The item you ordered costs ninety dollars, not nine,” the existence and identity of the item, and the fact that it was ordered, are presumed to be part of the common ground in the current context (old), and so is the addressee's belief that the cost of the item is $9; only the corrected cost of $90 is new information. The emphasis on ninety draws attention to the part of the presumed belief that is being corrected. Thus it is not only conceptual content that needs to be available to the microplanning stage, but also indications as to what is new and what is old, and what aspects are to be stressed or focused. The planner needs at least to apply knowledge about the phrasing of new and old information (e.g., the use of indefinite vs. definite NPs), about the lexical presuppositions and implicatures of the items used (e.g., that succeeding presupposes trying, that regretting that φ presupposes that φ, or that some implicates not all), about the presuppositions of stress patterns, and about focusing devices (such as stress and topicalization). The effect of applying these sorts of pragmatic knowledge will be to appropriately configure the surface-oriented LFs that are handed off to the surface realizer, or, for pragmatic features that cannot be incorporated into the LFs, to annotate the LFs with these features (e.g., stress marking).