Sentence 1: All my friends are big football fans. 
 Sentence 3: I'm not a fan but still predict who's going to win 
 Sentence 4:  So far I've been really accurate 
 Sentence 5:  I've been right more often than anybody else I know 
 Option 1: I sometimes watch matches with them. 
 Option 2: They started to change when I showed them brain injury statistics for players.