Logic

The Sims
Logic helps you advance in certain careers, and also to cast spells or perform other magical acts. In the original Sims, the only way of increasing a Sim's Logic bar was to play chess, but with Livin' Large, the chemistry set and telescope was added, which are other ways of increasing the Logic skill.

The Sims 2
Once Open for Business is installed, Logic points increase the rate a Sim earns badges for being a Cashier and Restocking items. It also affects the odds of winning a chess game.

Sims can gain Logic points by using the chess set, stargazing with or looking through a telescope, or using the SimSanto Inc. Biotech Station, which is the career reward for the Science track. Doing the crossword in the newspaper will also give a small amount of Logic.

If University is installed, teenagers with a high Logic skill (level 8 or higher) qualify for the Will Wright Genius Grant, which is a §750 scholarship.