Final answer:
The specific lines 89-100 are not provided, preventing a direct analysis of Ross's words about Macbeth. Evaluations of Macbeth's character in Shakespeare's play can vary, and without the context of Ross's exact statement, an assessment of its fairness or accuracy is not possible.
Step-by-step explanation:
The lines 89-100 referred to in the question do not appear in the provided excerpts from Shakespeare's Macbeth. Therefore, without the specific passage, it is impossible to determine what Ross says in lines 89-100 or to evaluate the fairness and accuracy of his assessment of Macbeth. However, looking at the character of Macbeth as presented in the play and the selections from other portions of the text, we can infer that Ross's comments elsewhere in the play tend to be observant and insightful regarding the unfolding events. As with all interpretations of literature, assessments of Macbeth's character will vary. Moreover, without the specific context of Ross's lines, any judgement regarding the fairness and accuracy of his assessment would be speculative. It is critical for a careful reading to include the actual lines in question to provide an informed analysis.