zelph playground — a semantic network reasoning engine, running entirely in your browser. Type .help for commands, or use the demo buttons. Docs: zelph.org
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Graph of the last result node:

Some prerequisites may be missing

This demo step builds on modules or facts created by other buttons you have not pressed yet in this session (listed with their group):

Buttons with a yellow dot depend on steps not pressed yet; hovering over them lists those steps. They stay enabled on purpose: you can also satisfy prerequisites by typing the commands into the terminal yourself. If you have done that, feel free to run this step anyway.