Genius is a mental trait in The Sims 3. It is first available at birth. It actually conflicts with the stupid trait, but that trait was scrapped due to its similarity to the absent-minded trait. Yet, a Sim can still have the "genius" and "absent-minded" trait. An example of a Sim with both of these traits is Cycl0n3 Sw0rd.
Geniuses are brilliant logical thinkers, masters of chess and excellent hackers. They savor pursuits of the mind.
Geniuses prefer watching the history channel on the television.
Geniuses may autonomously "contemplate" their surroundings. This action will activate this moodlet for 2 hours. As this is an autonomous action, the player cannot force this interaction, but it can be cancelled.