This Logical Aptitude Test is designed to judge your skills at inference, your ability to reason through statements and arrive at conclusions that have to follow from them. Thinking logically and consistently is one measure of human intelligence. People who perform better on this test demonstrate clearer rationality in assessment of what is said than those who perform worse.
When taking the test, remember to focus on validity while you work through the test. Do not get caught up in making the arguments sound.
One more tip: If you don't know an answer, skip it. Correct answers are worth three points (3), wrong answers cost a point (-1), and skipped answers cost nothing (0).