Valid arguments, contingent truths & forms
n Proposition Symbol Explanation 1 Peter is gay. P1 Premise 2 Peter is male. Q From 1 Valid? Perhaps. A truth table with show: P Q ¬Q P∧¬Q T T…
Validity and necessary truths
Validity is defined in a couple of ways. I like to define it like this: An argument is valid iff the superconjunction1 of all the premises and the negation of…
The term non-sequitur
As Wikipedia notes,i the term is used in everyday speech to deny a conditional (if-then statement), and it is also used in logic to mean an invalid argument. This together…