Multiple choice
This circuit prepares qubit 0 in some state. What expectation value ⟨X⟩ does it have along the Bloch X-axis?
const c = circuit(2); const x = [0.6, 1.2]; c.ry(2 * x[0], 0); c.ry(2 * x[1], 1); return c;
Commit your prediction for ⟨X⟩ of qubit 0 — then run it.