With the applet below you drag counters to one of the eligible positions on the bilateral diagram. After you get the desired configuration, press the Interpret button to check your understanding.
On the left from the applet there is an original Lewis Carroll's verse that helps remember the purpose of each color.
- Lewis Carroll's Logic Game (an introduction)
- Controversial Venn Diagrams
- Bilateral Diagrams
- Lewis Carroll's Logic Game (trilateral diagrams)
- Sample soriteses
- Lewis Carroll's Logic Game (rules and a tool)