John Barwise and John Etchemendy, [1999] Language, Proof and Logic
For the Tarski's World part of LP&L, a standard interpretation is used of various sized polyhedra on a chessboard. Here is a link to their screenshot of it Tarski's World.
Here we are just trying a few samples to see if the software is running correctly.
John Barwise and John Etchemendy, [1999] Language, Proof and Logic
This video shows extending, closing, and Analytical Consequence for a pretty advanced example tree. The tree itself is broad, spreading a long way from left to right. This leads to some scrolling back and forth because the applet is being held to the width of a printable page.
John Barwise and John Etchemendy, [1999] Language, Proof and Logic
For the Tarski's World part of LP&L, a standard interpretation is used of various sized polyhedra on a chessboard. Here is a link to their screenshot of it Tarski's World.
John Barwise and John Etchemendy, [1999] Language, Proof and Logic
For the Tarski's World part of LP&L, a standard interpretation is used of various sized polyhedra on a chessboard, for example,
Here we are just trying a few samples to see if the software is running correctly.
John Barwise and John Etchemendy, [1999] Language, Proof and Logic
What follows are further Ana Con inferences.
John Barwise and John Etchemendy, [1999] Language, Proof and Logic
What follows are further Ana Con inferences.
John Barwise and John Etchemendy, [1999] Language, Proof and Logic
LP&L comes with a Normal or Standard Interpretation, and this certainly affects how trees should and can behave.
For example, the polyhedra are either tetrahedra, cubes, or dodecahedra. If a particular polyhedron is a cube it cannot be a tetrahedron, so Cube(a)&Tet(a) cannot be true and a branch containing Cube(a) and Tet(a) should close or be able to close.
John Barwise and John Etchemendy, [1999] Language, Proof and Logic
For the Tarski's World part of LP&L, a standard interpretation is used of various sized polyhedra on a chessboard. Here is a link to some information about it Tarski's World.