Perception of order
At several occasions, Heinz von Foerster presented a numerical sequence which, in a modesty, I shall call “Heinz von Foerster’s sequence”. Given the numbers 0, 1, 2, 3 … up to 9 how would you complete the following ordered sequence:
8 — 5 — 4 — 9 — 1 — …
If you prefer to read about the riddle in detail have a look into Heinz von Foerster’s article “Perception of the future and the future of perception” published in Instructional Science 1 (1972) 2: p31-43.
Here is a variant of “Heinz von Foerster’s sequence”, again for numbers 0 to 9:
8 — 3 — 1 — 5 — 9 — …