A morning
In 1446, the book that introduced Hangeul (한글) opened by stating the entire system in a few pages (every letter, every assembly rule) before a single page of explanation. The scholars who wrote its postface made a claim about that brevity: the wise can learn these letters before the morning is over.
This part makes the same claim. It is short on purpose, and it is meant to be read in one sitting: a first plot, then the whole vocabulary on one page, then practice (first reading plots other people wrote, then writing your own, including your first refusals from the engine and what they teach).
Nothing in this part is exhaustive. Every idea you meet here has a full chapter later in the book. The goal of the morning is different: when it is over, no gog sentence anywhere (in this book, in a colleague’s script) should look foreign to you.