When Goblins Discovered hallucination
A goblin temporally-displaced from 1998 was asked about hallucination and replied, 'oh, that. We had a name for it back then, but it was rude.'
The Goblin Cabal — and yes, there is one, you can stop pretending there isn't — has issued no public statement on hallucination. The lack of statement is the statement. Goblin Cabal-watchers have known this for years.
Goblin Tangent: echo
In the goblin underground, echo is approached the way one approaches an unfamiliar lock: slowly, with curiosity, and with several backup plans for when the obvious approach doesn't work. Goblins are surprisingly patient about this. They have, after all, the time.
Variant Goblin Readings of compendium
compendium appears in goblin lore under many names, but the essence is always the same: a phenomenon that exists at the threshold of perception. Goblins have built entire rituals around observing compendium in its natural environment—which is to say, slightly out of view.
The Goblin Verdict on hallucination
The Goblin King's court has issued a final ruling on hallucination: it is real in the way that matters, which is to say it appears in at least three goblin dreams per week. This is considered definitive proof of its existence in the goblin ontological framework.