In one telling study, research participant heard sentences with the first part of a key word omitted (which we indicate by “*”), and with different endings of the sentence presented to different participants. Thus, some participants heard “The *eel was on the axle,” and others heard “The *eel was on the orange”. In both cases, the participants reported hearing a coherent sentence – “The wheel was on the axle” in the first case and “The peel was on the orange” in the second – without ever consciously registering the gap. Nor did it register that they themselves had provided the “wh” or “p” they “heard” in order to make sense of the sentence.