In a quaint village, three individuals, Emeka, Riko, and Lysander, find themselves intertwined in a peculiar incident involving a missing heirloom. Emeka, the local blacksmith, crafted a unique iron key for the village elder, which was rumored to unlock a chest with sentimental artifacts. Unfortunately, Emeka didn't witness to whom the elder handed the key after its creation. Riko, the innkeeper, noticed the elder passing a key to Lysander, a traveling bard, who recently performed at the village square. However, Riko's perception was obfuscated by the crowd, and she couldn't confirm if it was indeed the heirloom key.

While Riko was aware of Lysander receiving a key, she also happened to overhear a conversation between two villagers discussing that the elder had planned to hide the heirloom to safeguard it from being stolen during the recent festival. Unbeknownst to Riko, Lysander was aware of the elder's concerns about theft and had offered to keep the heirloom safe during the festivities. The elder entrusted the key to Lysander, but only after the villagers Lysander had overheard finished discussing the elder's worries at a discreet distance. The elder instructed Lysander to return the key after the celebration. On the day following the festival, the elder could not locate Lysander and incorrectly presumed that the key was stolen.

Meanwhile, Emeka had seen Lysander with a key after the festival but couldn't identify it as the heirloom key he created. The next morning, a perplexed Emeka approached Riko to inquire if she knew anything about the missing heirloom. Riko informed Emeka that the elder had given a key to a traveler, which she assumed was Lysander but did not confirm if the key was the heirloom. Neither Emeka nor Riko knew of the arrangement between the elder and Lysander.

Two days later, the key was found by another villager in the elder's garden, and the rumor spread, but none of the three, Emeka, Riko, and Lysander, was aware of this latest development.

Given this situation, who knows what about the heirloom key's whereabouts during and after the festival, and what, if anything, have Emeka, Riko, and Lysander incorrectly inferred or remained uninformed about?
Emeka, the blacksmith, knew that he crafted an heirloom key for the village elder but was not aware of its whereabouts after handing it over to the elder. He did not witness to whom the elder gave the key and did not see Lysander with the key during or after the festival, despite having noticed Lysander with a key later. Emeka's understanding of the situation is limited to the knowledge that he created the key and that it was missing after the festival. He is uninformed about the arrangement between the elder and Lysander concerning the key and about its eventual discovery in the elder's garden.

Riko, the innkeeper, is aware that the elder handed a key to a traveler, whom she assumes to be Lysander due to her having seen them interact, but she did not specifically know that this key was the heirloom key because her view was obstructed. She also overheard that the elder had planned to hide the heirloom, so she could infer that the key given to Lysander was part of a protective measure, although she did not know the specifics of the agreement between the elder and Lysander or Lysander's intentions to ensure the heirloom's safety during the festival. Riko remained ignorant of the fact that the key was later found in the elder's garden.

Lysander, the traveling bard, knew that the elder entrusted him with the heirloom key, intending for Lysander to safeguard it during the festivities. Lysander also intended to return the key as per their agreement. However, his plans were not common knowledge; neither Emeka nor Riko was aware of this arrangement. Lysander did not know that Emeka was the creator of the key, nor that Emeka and Riko were discussing its disappearance. Concerning the key's discovery in the elder's garden, Lysander, just like Emeka and Riko, remained unaware of this event.

All three individuals, Emeka, Riko, and Lysander, had different levels of knowledge about the heirloom key, its importance, and its temporary safeguarding arrangement. Each one had gaps in their understanding of the full context, contributing to the mystery of the key's whereabouts following the festival. Furthermore, all of them remain uninformed about the key being found in the elder's garden two days later.