You can read the task, take hints and check your answer — but nothing is saved. No XP, no skill points, and this task will not be marked complete.
SRS §35 requires that points, XP and reputation each keep an auditable history. What must be written on every change instead of overwriting a stored total?
What this proves: Model economies as append-only ledgers.
Need assistance? You can reveal sequential hints. Each hint applies a minor penalty to your score.
If you are completely stuck, you can unlock the full step-by-step walkthrough.