PHI 1101 Chapter Notes - Chapter 4: Modus Tollens, Henri Matisse, Modus Ponens

• School: University of Ottawa
• Department: Philosophy
• Course: PHI 1101
• Professor: Dean Lauer

Document Summary

Chapter 4 notes: some valid argument forms: sentential form, form and variables. One premise can be a conditional sentence ( if then ) The second premise is the same as the clause the comes after the if in the conditional. The conclusion is the same as the clause that follows the then in the conditional. Sentential form- when letters replace the simple sentences that make up compound sentences. Sentential variables- stand for any sentence that might be substituted with them. Therefore, q (3 dots or line above: connectives. We can use symbols to replace ordinary connective words like and , or , and if then . They should be regarded as representing the logical function performed by a number of phrases that have a common role, rather than a translation. Either it is a cat or it is a dog. If it bites, then you should be wary.