Logic is what we use to make sense of reality and to uncover truth. The articles in this category are lessons in symbolic logic and critical thinking. Since they are listed in reverse chronological order, you should go to the end of the last page to start with the earliest lesson.
For the past 14 lessons, we have been focused on sentential logic. This is where we use single letters in place of whole sentences and focus on the logical relations made between whole claims. But an argument can be valid without there being logical relations between whole sentences.