barwise

LP&L Trees 6 Identity Samples martin Thu, 07/01/2010 - 12:49
Topic
Logical System
Last altered 1/9/14

Reading

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.

LP&L Trees 0 Video: Advanced Tarksi World Tree martin Wed, 06/30/2010 - 16:37
Topic
Logical System

6/30/11 11 Software

Reading

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. [In the general case, though, the applet could be re-sized to take advantage of your no doubt sizable monitor and its extensive screen real estate.]

LP&L Trees 5 Predicate Samples martin Tue, 06/29/2010 - 23:39
Topic
Logical System
Last altered 1/9/14

Reading

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.

LP&L Trees 1 Analytical Consequence Ana Con I

Topic
Logical System
Last altered 1/9/14

Reading

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.