First-Order Logic Test

This Demonstration provides a test in first-order logic. A simple two-dimensional world is inhabited by triangles, squares, and pentagons of three sizes and two colors. The task is to find truth values of ten statements about the world.

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DETAILS

Reference:
J. Barwise and J. Etchemendy, Tarski's World, Stanford, CA: CSLI Publications, 1993.
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