PHL309 Logic, Language, and Thought Professor: Craig DeLancey
Office: Marano 212A

Past Assignments
27 January
Read the Allegory of the Cave section of Plato's Republic. You can read this by reading the first half of book 8, which is available for free here.

Optional: if you are a virtuous human being and want to impress me, read also the short dialogue The Meno by Plato.
29 January
Please read Book 1 of Euclid's Elements. You are reading just to familiarize yourself with how Euclid thought and argued. You'll find you know everything he says; just note how he arrives at his conclusions. An online version can be found here.

Answer the following questions; you can either hand me hardcopy, or answer them on BlackBoard (I'm not sure I set up the BlackBoard correctly! Let me know!).
  • Is Euclid a Platonist? That is, how do you think that he believes he knows the things he claims to know?
  • Consider postulate 5. As we'll see this semester, this is a very important postulate. Do you agree with it? That is, in your view, is it true? If you believe it is true, how do you think you know that it is true? If you doubt it, why would you doubt it?
1 February
Read the selection from Aristotle. Come to class prepared to explain what Aristotle's view is on the infinite.
3 February
Reading. Read the selection from Galileo's Two New Sciences: First Day, from pages 11 [49] to 28 [67].

I emailed to you the prefered translation. If you didn't get that email let me know.

Also, a fair translation is freely available here.

A brief question for you to answer: Galileo considers a reason why some things may hold together. He uses the two slabs of marble example to illustrate the idea. What is this reason? Do we consider it today sufficient explanation of why things hold together?

5 February
Reading. Read from Galileo's Two New Sciences: First Day, from pages 28 [67] to 35 [73].