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); c.ry(Math.PI / 3, 0); c.ry(Math.PI / 4, 1); c.cx(0, 1); return c;
Commit your prediction for ⟨X⟩ of qubit 0 — then run it.