I didn't mean to imply that the fallacies have anything in particular to contribute to symbolic logic. It's just that, when one takes a logic course, one expect

I didn't mean to imply that the fallacies have anything in particular to contribute to symbolic logic. It's just that, when one takes a logic course, one expects to leave the class with better logical skills, both formal and informal. Gracefully, most logic teachers and books take the time to briefly cover some additional topics such as the fallacies.