Weird question, I know.
EXAMPLE:
Logical brain: You should study
Rest of brain: *plays video games*
Logical brain: You're not going to have any time tomorrow evening to study.
Rest of brain: *plays video games*
Logical brain: Even if you pass without studying, you'll have a miserable time in the final.
Rest of brain: *plays video games*
Logical brain: You'll wonder for WEEKS if you did okay or if you ruined your GPA, it will be HELL if you don't study.
Rest of brain: "BLAME IT ALL ON MY ROOOOOOTS! I SHOWED UP IN BOOOOOOTS! AND RUINED YOUR BLACK TIE AFFAIR!"
Logical brain: *headdesk*