When it invents something and states it with complete confidence. The dangerous ones look ordinary — a date, a citation, a phone number. Check anything that matters.
The drawing that proves the sentence above. It is the same card that is in the book.
Think of it as
a colleague's account of a meeting they half-attended.
For example
It gives you a book title, an author and a year. All three sound completely right. The book has never existed.
This is one card out of 275.
The hundred words you meet most are free — the whole set, animated, in one file that works with no internet.
Volume 1 has all 275 in fifteen chapters, with Staying Safe the largest chapter on purpose.