Sentence 1: Matthew is not allowed to eat or drink near the computer. 
 Sentence 3: During a moment of inattentiveness, he knocks the glass over 
 Sentence 4:  Water spills all over the keyboard 
 Sentence 5:  Matthew looses computer privileges for a month 
 Option 1: He always obeys the rules. 
 Option 2: One day, Matthew brings a glass of water near the laptop.