Poythress writes, “I am providing various course documents online, which you are free to download. Most of these come from courses being taught at Westminster Theological Seminary in Philadelphia. Let me remind you that these course materials are very much works in progress. They are tentative in nature, and subject to repeated alteration and improvement. Not everything in them represents settled views on my part.”
You may use all the course materials in OpenDocument Format under the GNU Free Documentation License. For details, you must read this license. Briefly, the license allows you to use and pass on both unaltered and altered files, provided that you give credit to the author and that you grant to others the same freedom given to you.