Formal reconstruction of the argument for the central thesis

Formal reconstruction of the argument for the central...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
Formal reconstruction of the argument for the central thesis (CT) Premises: a. A thing can be thought about only if it is possible for it to exist. [= step (4) above] b. Anything that does not exist, cannot exist. [= step (5) above] But (b) is equivalent to: c. Anything that can exist, does exist. From (a) and (c) it follows that: d. A thing can be thought about only if it exists. And (d) is equivalent to:
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: e. Anything that does not exist, cannot be thought about. [= (3) above] In symbols: Tx : x is thought about Ex : x exists : it is possible that … a. 2200 x ( Tx → Ex ) Premise b. 2200 x (¬ Ex → ¬ Ex ) Premise c. 2200 x ( Ex → Ex ) From (b) by contraposition d. 2200 x ( Tx → Ex ) From (a) and (c) by hypothetical syllogism e. 2200 x (¬ Ex → ¬ Tx ) From (d) by contraposition...
View Full Document

This note was uploaded on 11/14/2011 for the course PHI PHI2010 taught by Professor Jorgerigol during the Fall '09 term at Broward College.

Ask a homework question - tutors are online