Read 09-TautolContradic.ppt, and read Section 1.2 and page 25 from the textbook. Create a table that lists new symbols and the meaning of those symbols. This list should include the following:

• $\equiv$
• $\Leftrightarrow$
• $\wedge$

Be sure that you note any differences between the symbols used in the slides and those in the textbook. Include any questions that you have from your reading.