# predicate

Fast Start on Web Page presentations (for Instructors) martin Thu, 10/16/2014 - 17:20
Topic

10/15/14  under construction

[Deriver works in the form either of javascript widgets, which appear directly in a web page viewed through a web browser, or as a downloadable java application, which runs like any other application (usually off the desktop on your computer).]

With the widgets in web pages, it should be fairly clear what the possibilities are. The downloaded application offers more, but at the cost of being more complex.)

Topic
Logical System

2013

You may have derivations of your own that you wish to try. Just type, paste, or drag and drop, them into the panel, select your derivation, and click 'Start from selection'. [Often copy-and-paste won't work directly from a Web Page; however, usually drag-and-drop will work!]

You will need to use the correct logical symbols. Here they are

F ∴ F & G ∼ & ∨ ⊃ ≡ ∀ ∃ ∴ (or use the palette to produce them)

Help with Tutorial 25h admin Sat, 01/11/2014 - 01:50
Topic
Logical System

4/24/06

### Tutorial 25 Exercises h

Help with Tutorial 25g admin Sat, 01/11/2014 - 01:50
Topic
Logical System

4/24/06

### Tutorial 25 Exercises g

Help with Tutorial 25e admin Sat, 01/11/2014 - 01:50
Topic
Logical System

4/24/06

Topic
Logical System

## Help with Tutorial 25abc

Topic
Logical System

4/24/06

Tutorial 24: The restrictions on the quantificational rules admin Sat, 01/11/2014 - 01:50
Topic
Logical System

### Skill to be acquired:

To understand how the various restrictions on the quantificational rules work to exclude certain kinds of invalid inferences

Bergmann[2004] The Logic Book Section 10.1

### The Tutorial

#### The Rule of Universal Elimination UE

If a derivation contains a line of the form

n (∀<variable>)<scope> <any justification>

then a line of the form

## Tutorial 23: The semantics of relations

Topic
Logical System

### The Tutorial

The semantics of relations proceeds in much the way one would expect-- the new item that has to be taken account of is the order of the terms (because, for example, Tab is not at all the same thing as Tba -- Arthur being taller than Beryl is not the same as Beryl being taller than Arthur).

Interpretation 1

Universe= {a,b}
F={a}

Tutorial 22: Symbolizing Relations admin Sat, 01/11/2014 - 01:50
Topic
Logical System

2013

## Tutorial 22 Symbolizing Relations.

### The Tutorial

Thus far we have considered only 'monadic' predicates-- our atomic formulas consist of a predicate followed by only one term-- for example, Fx. But in English we regularly encounter dyadic predicates or relations. For example, 'Arthur is taller than Bert' cannot be symbolized with the tools we have used so far; what is needed is a relation to represent '...is taller than ...' Txy, say, and then the proposition would be symbolized Tab.