## 10 Philosophy: Logic Quiz

On Friday, September 27th we’ll have a quiz on the material we’ve covered on logic. For this quiz you should know

• definitions of the relevant terms (statement, validity, etc.),
• how to represent the logical structure of a statement, and
• how to use truth tables to analyze statement types and to determine whether or not an argument is valid/invalid.

## 10 Philosophy Test

On Monday, April 8th we’ll have a test on the material we’ve covered so far (except the material on Plato that we’ve only just begun.)

The test will cover

• The argument for existence given by Descartes
• Logic (Truth tables and Validity, etc.)
• Fallacies (What are they? What are the common types of fallacies?)

Your written task, your presentations (on the fallacies), and your logic quiz will be a good guide to the sorts of questions you will be asked. Make sure that you review both Google Docs on the fallacies.

## 10 Philosophy: Science and Uniformity

Read Chapter 6 of Bertrand Russell’s The Problems of Philosophy.

You overhear the following discussion in class.

Stephen: Paper always burns, that’s a scientific fact.
Claire: No it’s not, paper doesn’t burn if it’s wet!

1. Is “paper always burns” a scientific fact? Is “paper always burns unless it’s wet” a scientific fact?
2. Can you think of any scientific claims that are always true, without exception? What are they?
3. Does science depend on the assumption of the uniformity of nature? Explain.

## 10 Philosophy Test

On Thursday, October 18th we’ll have a test on the material we’ve covered so far.

This includes

• The argument for existence given by Descartes
• Logic (Truth tables and Validity)
• Fallacies (What are they? What are the common types of fallacies?)

## 10 Philosophy: Logic Quiz

On Thursday, September 27th we’ll have a quiz on Logic.

For this quiz you should know how to symbolize the logical structure of a statement, how to show that an argument is valid/invalid, and how to show that a statement is a tautology/contradiction. You should also know the definitions of the relevant logical terminology.

Here are the questions we discussed in class today. If you didn’t get a chance to complete them in class, work on these before the quiz. If you can answer these questions, you should be well prepared for the quiz!

1. Symbolize the argument below and use truth tables to show that it is invalid.
P1: If it’s raining outside then Dr. McDonald will have his umbrella.
P2: It is not raining outside.
C: Dr. McDonald does not have his umbrella.
2. Prove that the following argument form is valid.
$\begin{eqnarray}A\to B\\ B\to C\\ \overline{A \to C}\end{eqnarray}$
3. Is the argument form below valid or invalid? Prove your answer.
$\begin{eqnarray}(A\wedge B)\to C\\ \overline{A \to (B \to C)}\end{eqnarray}$

## 10 Philosophy: Proving Validity

Use a truth table to show that the argument below is valid.

$\begin{eqnarray}A\to B\\ \overline{\neg B \to \neg A}\end{eqnarray}$