“…-If there is no edge f ∈ E such that e ∩ f = ∅, then there is a probability measure which assigns 1/|e| to all vertices contained in e and Every known example of a quantum structure with no group-valued measure (those in [11,16,17]) used a computer for generating the quantum structure, and/or for the verification that there is no group-valued measure, so the actual idea behind the construction remains hidden. We present a handcrafted example of an OA with no group-valued measure.…”