Philosophy_110_Chp10[1] - 4/9/2009 Counterexamples to...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
4/9/2009 1 Chapter 10 More on Evaluating Premises Counterexamples to Statements Often, sweeping statements are made in the course of debates and poorly constructed arguments. For example, “All Roman Catholics are against abortion.” All we need to do to discredit such a statement is to think of an instance that is not true. Example: “No women are lawyers.” Gloria Allred is a woman and a lawyer. “No men have walked on the moon.” Neil Armstrong is a man and has walked on the moon. A priori versus A posteriori A priori We know the truth of a premise through the meanings of the words involved. These statements are true or false before any empirical investigation. Ex: “All bachelors are unmarried men.” A priori true Ex:“There are at least ten atheists who believe in God.” A priori false A posteriori The truth of such statements is known only after investigation “Nixon is younger than Clinton.” A posteriori false “75% of the U.S. population is Christian.” A posteriori true “75% of automobile drivers are better than average automobile drivers.” A priori false
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 2

Philosophy_110_Chp10[1] - 4/9/2009 Counterexamples to...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online