 Kulvicki denies that this account entails an error theory because he thinks that intuitions are not particularly telling about the distinction between hearing as an individual event and hearing a sound. However, a threefold distinction should apply here. Grant the dispositional sound. Grant hearing episodes. Now, the duration of a hearing episode is different from the duration of an occurrent sound. You set a tuning fork in motion. It vibrates for thirty seconds. But then, after ten seconds, you get bored and block your ears with your hand. The duration of your hearing is ten seconds. But the sound is still there, for another twenty seconds. Generally speaking, unheard sounds are accounted for in the dispositional theory only as unrealized dispositions. Occurrent unheard sounds are invisible to the dispositional account.