Validity and soundness - Did a visit to the doctor mean Trump was about to resign?

A recent New York Times editorial on vaping provides a nice example of what a well-crafted argument looks like.

Can the President pack a good argument into a couple of tweets?

To introduce you to the concept of logic-checking, let’s start with some timely material related to the Democratic debates.

Fact-checking is a vital first step to navigating the world and getting to the truth. Here's the second.