Which logical fallacy is used in the text?
Mr. Murray's class is so boring! Why are all literature classes so dull?

 - hasty generalization: a broad claim based on too few observations
 - appeal to nature: the assumption that natural things are always good
 - slippery slope fallacy: the false assumption that a small first step will lead to extreme consequences
The text argues that a single boring class indicates that all classes on the same topic are dull. However, this isn't necessarily true. This illustrates a type of logical fallacy known as a hasty generalization.