Following is a link to some EG exercises to practice your knowledge.  


Make sure you read the short Introduction to Existential Graphs first. To learn even more, read Elements of Logic  

Then go here to test your knowledge:  Training in Reasoning.  Login, then click on "Solve Library Problems" to practice!


WYTNNYS provides resources for the study of the life and works Charles Sanders Peirce (1839 -1914) through the works of Kenneth Laine Ketner.  The website is named for LeRoi Wyttnys, whose being is that of a fictional French/Welsh centenarian, student and friend of Charles Perice, with the world of His Glassy Essence:  An Autobiography of Charles Sanders Peirce by Kenneth Laine Ketner.