Peirce Alpha Graph Proof Builder

Your browser does not support Java. This is not surprising because Java applets were retired years ago. As a substitute, there is a standalone version of the Peirce Alpha Graph Proof Builder, Peirce.jar. On some operating systems, simply double-clicking the downloaded file Peirce.jar will start the program; on others, you may need to type the command "java -jar Peirce.jar" (I know, I know). Either way, you will need a working Java installation. If your computer comes without Java, you may download it for free at https://www.java.com/download.