Final answer:
Referencing infamous people can still be included in an appeal to authority, depending on their credibility and expertise. In 'Animal Farm,' Old Major's appeal to 'Man' serves as an example of the need for rebellion and overthrowing oppression.
Step-by-step explanation:
In an appeal to authority, referencing infamous people can still be included. However, it is important to consider the credibility and expertise of the infamous person being referenced. In the case of Old Major in 'Animal Farm,' he appeals to the authority of 'Man' to fuel the rebellion. Even though 'Man' is portrayed negatively and as the oppressor, Old Major's reference still serves as an appeal to authority because he is using the idea of 'Man' as an example of the need for rebellion and overthrowing oppression.