Back at Elsinore, Hamlet explains to Horatio that he had discovered Claudius's letter with Rosencrantz and Guildenstern's belongings and replaced it with a forged copy indicating that his former friends should be killed instead. A foppish courtier, Osric , interrupts the conversation to deliver the fencing challenge to Hamlet. Hamlet, despite Horatio's pleas, accepts it. Hamlet does well at first, leading the match by two hits to none, and Gertrude raises a toast to him using the poisoned glass of wine Claudius had set aside for Hamlet. Claudius tries to stop her, but is too late: she drinks, and Laertes realizes the plot will be revealed. Laertes slashes Hamlet with his poisoned blade. In the ensuing scuffle, they switch weapons and Hamlet wounds Laertes with his own poisoned sword. Gertrude collapses and, claiming she has been poisoned, dies. In his dying moments, Laertes reconciles with Hamlet and reveals Claudius's plan. Hamlet rushes at Claudius and kills him. As the poison takes effect, Hamlet, hearing that Fortinbras is marching through the area, names the Norwegian prince as his successor. Horatio, distraught at the thought of being the last survivor and living whilst Hamlet does not, says he will commit suicide by drinking the dregs of Gertrude's poisoned wine, but Hamlet begs him to live on and tell his story. Hamlet dies in Horatio's arms, proclaiming "the rest is silence". Fortinbras, who was ostensibly marching towards Poland with his army, arrives at the palace, along with an English ambassador bringing news of Rosencrantz and Guildenstern's deaths. Horatio promises to recount the full story of what happened, and Fortinbras, seeing the entire Danish royal family dead, takes the crown for himself, and orders a military funeral to honor Hamlet.
Critics consider and assess the extent to which a work succeeds in its purpose. The work under consideration may be literary, theatrical, musical, artistic, or architectural. In assessing the success of a work, the critic takes account of why it was done – for example, why a text was written, for whom, in what style, and under what circumstances. After making such an assessment, critics write and publish their evaluation, adding the value of their scholarship and thinking to substantiate any opinion. The theory of criticism is an area of study in itself: a good critic understands and is able to incorporate the theory behind the work they are evaluating into their assessment.  Some critics are already writers in another genre. For example, they might be novelists or essayists. Influential and respected writer/critics include the art critic Charles Baudelaire (1821–1867) and the literary critic James Wood (born 1965), both of whom have books published containing collections of their criticism. Some critics are poor writers and produce only superficial or unsubstantiated work. Hence, while anyone can be an uninformed critic, the notable characteristics of a good critic are understanding, insight, and an ability to write well.