LET'S SNACK ON A LOGIC SANDWICH

After spending time with ethos and pathos, we'll turn to the last of the three: logos, which of course you recall is argument by logic or, according to the original Ancient Greek definition, the text of the argument.

Using logic is about applying solid principles of reasoning—or, as Heinrichs suggests, making a delicious logic sandwich—to get your audience to come to your desired consensus.

In this, the last lesson of our unit on rhetoric, we'll take a look at two types of reasoning: deductive and inductive.

You might recognize "deductive reasoning" as the kind Sherlock Holmes uses. We're not aware of any fictional detectives that are famous for inductive reasoning, so there's probably a big money-making opportunity there.

That's a Wrap

This ends the first part of Thank You For Arguing, which is titled "Offense." You've probably noticed there's a lot more to the book. Obviously, we haven't covered every single rhetorical device during this unit. But we have covered some of the big ones, and those that are especially helpful for a public speaker. You'll encounter many of these rhetorical concepts again in later units.

We'll read a few more chapters of Heinrichs in a bit, but now that you've got a solid base in rhetoric, let's train our focus back onto public speaking specifically. In the next unit, we'll cover the steps a speaker should take to prepare for a speech.

And now, allow us to end this unit with a little chiasmus (which happens to be our favorite rhetorical technique):

"Don't sweat the petty things, and don't pet the sweaty things."

Only half of that wise statement has to do with public speaking but hey—it's still good, solid advice.