Final answer:
The correct spelling of 'cannen' in the context of the question is 'canon', which signifies the authoritative collection of literary works.
Step-by-step explanation:
The correct spelling of 'cannen' in sentence 25 is canon. The literary term refers to the collection or body of works that are considered to be authoritative or of enduring value in literature.
In the context of the student's question about the importance of Shakespeare's Hamlet, the word illustrates the play's significance as a foundational piece of literary achievement that has influenced countless works and has been widely studied and celebrated since its creation.
In sentence 25, the correct spelling of 'cannen' is 'canon'.