Here is a prove that even within your own brain you can not avoid conflicts. Have a look at chart below and say out loud the colour of the word – not the word itself. Good luck ;-)
YELLOW BLUE ORANGE
BLACK RED GREEN
PURPLE YELLOW RED
ORANGE GREEN BLACK
BLUE RED PURPLE
GREEN BLUE ORANGE
Pretty tricky huh? Takes a while to tell yor brain halfes that they should not cooperate ;-)