Mock the mocker and other logical puzzles

Riddles about knights and liars (about people who speak only the truth and those who always lie) have become very popular among young people and adults. Therefore, the author’s riddles devoted the eight of the first chapters of this book. They are streamlined in terms of complexity: from elementary to a very thin metallum about the source of youth (The one who solves this riddle is worthy of royal honors!) The rest of the book has a completely different orientation and concerns large logical depths. Here you will find something bewitching from the field of combinatorial logic. This wonderful scientific discipline now plays an important role in computer science and development of artificial intelligence, so this book is quite timely. Despite the depth of this topic, it is no more difficult to study it than the course of algebra or geometry at the institute.
Combinatorial logic is an abstract scientific discipline dealing with objects called combinators. As his combinators, the author chose birds. This was done in memory of Professor Haskele Curry, who was a great combinatorial logician and a passionate bird lover. The main reason he made the combinatorial logic of the main theme of this book is not in numerous practical applications of this logic, but in its great attractiveness. This area is considered purely technical, however, it is available to the general public, it is full of material from which you can extract entertaining riddles. At the same time, it is related to the fundamental issues of modern logic. What could be better for the book of logical mysteries?