Act 1 · Building Intuition

1. Think Fast, Think Slow

Your mind runs two systems. System 1 is fast, automatic, effortless. System 2 is slow, deliberate, effortful.reference 1 One operation, multiplication, flips you between them.

1. Meet the two systems

System 1 · fast

not started

3 × 4

Automatic · Effortless · Recognition, not work

System 2 · slow

not started

17 × 24

    Deliberate · Sequential · You feel every step

    2. Sort six of your own

    0 / 6 sorted

    System 1 · fast

      System 2 · slow

        3. The difference

        Same operation, two different machines. System 1 recognizes the answer; System 2 builds it. One arrives whole, instant, effortless, automatic. The other comes line by line, slow, deliberate, and you feel every step. Recognizing an answer and constructing one are not the same act.

        Keep the distinction. The next page asks a question that looks like recognition and is not, and watches a machine answer it on reflex.