In mission 5, the trial of intelligence involves a hazy and misleading clue. Take a look at the skulls above each doorway and note how many "red dots" there are. Each door will thus have one, two, three, or four red dots. Enter doors 4, 2, and 3 to claim the essence of intelligence. How this relates to the riddle printed on the trial's pedastel is a question best answered by Capcom's translation department.
Submitted by - troublejoker
The riddle in Mission six for Trial of Intelligence is the classic "Riddle of the Sphinx" from greek mythology. The Door with four dots represents a baby's hands and feet as crawls on the ground. The door with two dots represents the two feet of a young man standing upright. The door with three dots represents the old man walking on a cane. Go in the doors in that order as instructed in the riddle. Knowing this reasoning will better help a player remembering the order 4, 2, 3.