Answer the question below. Rubric scores it against an explicit rubric, cites the evidence for every score, and abstains rather than guess when the signal isn't there. This is a simplified taste of the real engine — no data leaves your browser.
knows(a, b) tells you whether person a
knows person b. A "celebrity" is known by everyone but knows no one. Find the celebrity
in as few calls as possible — and explain why your approach works.