To become familiar with the new rules for predicate logic trees with identity.
It is possible to use trees with formulas containing identity. Really there are two different ways to implement it: either there are two new rules, or there is one new rule and a new way of closing a branch from a single formula. Both will be described.
To learn about the Uniqueness quantifier (a part of identity), and to be introduced to definite descriptions.
Uniqueness is central in mathematics, and definite descriptions is a core area in philosophical logic.
1/17/20
1/17/20
[This is a film-- press the 'play' symbol.]
1/9/09
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The video shows an older implementation (but it should convey the principles).
2013
To learn about the Uniqueness quantifier (a part of identity), and to be introduced to definite descriptions.
Uniqueness is central in mathematics, and definite descriptions is a core area in philosophical logic.
To learn about functional terms and two new Rules of Inference II (Identity Introduction) and IE (Identity Elimination).
Reasoning with identity is vital for mathematics, philosophy, and many other areas.
To start to learn about identities, the semantics of identities, and typical expressions in English that might use identities.
Reasoning with identity is vital for mathematics, philosophy, and many other areas.
Welcome!
The tutorials presented here look at some topics in logic to the level of intermediate to advanced Predicate Calculus. They build on the Tutorials of Easy Deriver which provided the introductory material to Propositional and Predicate Calculus.
The program, widgets, or Notes, should be accompanied by a suitable textbook, such as:
2013
To become familiar with the new rules for predicate logic trees with identity.
Colin Howson, [1997] Logic with trees Chapter 9
It is possible to use trees with formulas containing identity. Really there are two different ways to implement it: either there are two new rules, or there is one new rule and a new way of closing a branch from a single formula. Both will be described.