buy-HON-PAST-Q (48) ⟨w2, w2⟩ ⟨w1, w1⟩ ⟨w2, w2⟩ ⟨w1, w1⟩ ⟨w2, w1⟩ ⟨w3, w1⟩ ⟨w1, w2⟩ ⟨w2, w2⟩ ⟨w3, w2⟩ ⟨w1, w3⟩ ⟨w2, w3⟩ ⟨w3, w3⟩ ⟨w1, w1⟩ ⟨w2, w1⟩ ⟨w3, w1⟩ ⟨w1, w2⟩ ⟨w2, w2⟩ ⟨w3, w2⟩ ⟨w1, w3⟩ ⟨w2, w3⟩ ⟨w3, w3⟩ ⎫ ⎬ ⎭ Moreover, the exhaustive particle dake attempts to cancel the alternative question acts except for the foreground question, 'As for John, did he buy a newspaper?'.
the cancel operation fails here.