Pepsi." This statement is an example of  the logical fallacy known as affirming  

a disjunct. The error lies in the assumption  that a preference for Coke inherently excludes  

the possibility of liking Pepsi. However, personal tastes are not  

mutually exclusive, and one can appreciate  different brands for different qualities. 

On the other hand, a Pepsi supporter might argue,  

"Pepsi is my absolute favorite,  which means Coke must taste awful." 

This is another instance of affirming a  disjunct. The belief that a fondness for  

Pepsi automatically translates to a disdain for  Coke is a flawed conclusion. Preferences are  

subjective, and liking one product does not  necessarily mean disliking its competitors. 

Both these instances show a common cognitive  error where individuals mistakenly assume  

that their preference for one option means an  automatic rejection of the alternative. This  

fallacy overlooks the nuanced nature  of personal tastes and preferences.