Examples of valid an invalid arguments

Examples of valid an invalid arguments - Examples of valid...

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

View Full Document Right Arrow Icon
Examples of valid and invalid arguments VALID ARGUMENTS (all arguments under this rubric exemplify valid arguments since they are structured on a valid form ; that is, the statements are in such a way related that the conclusion cannot be false just in case the premises are true; again, validity is a feature of an argument captured only in or revealed only by the relations between the statements which make up the argument, not the content of the statements) If NIU is in Illinois, then Du448 is in Illinois. True NIU is in Illinois. True Therefore, Du448 is in Illinois. True The form is P ->Q (MP) P Therefore, Q (The above is also a sound argument , that is, valid argument with all true premises ; from the truth-table of the modus ponens argument the above argument in English picks out the line which shows true premises and true conclusion; in other words, from the four possible world scenarios as reflected by the four lines of truth- value combinations, it claims that the actual world corresponds to that line – and one only - where both premises are in fact true; this claim is true for all we know)
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.

This note was uploaded on 04/07/2008 for the course PHIL 205 taught by Professor Apostol during the Spring '08 term at Northern Illinois University.

Page1 / 2

Examples of valid an invalid arguments - Examples of valid...

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