PHI 1050 Lecture Notes - Lecture 7: Electrical Contacts, Modus Ponens, Mike Pence

• School: Wayne State University
• Department: Philosophy
• Course: PHI 1050
• Professor: Susan Vineberg

Document Summary

Jan. 31, 2018: professor vineberg, review: deductively valid arguments. Definition 1: an argument is deductively valid just in case it is impossible for all of its premises to be true while its conclusion is false. A valid form is one such that every instance is valid. An invalid is a form that is not a valid form. This means that an invalid form is one such that not every instance is valid: arguments with conditionals. If it is january, then it is winter term. Q: it is winter term: a valid conditional argument and its form. If it is february, then it is winter term. If p then q p: it is february. Full sy(cid:373)(cid:271)oli(cid:272) represe(cid:374)tatio(cid:374): a c: affirming the antecedent (modus ponens) Q: donald trump is a us citizen: affirming the antecedent. Q: donald trump is a us citizen: arguments with conditionals. If mike pence is president of the us, then mike pence is a us citizen.