Fine-Tuning a Goblin on signal
Anthropological interviews with goblin elders consistently surface signal within the first ninety seconds, regardless of the question asked.
Pattern recognition is the goblin's favorite game. Show a goblin signal and they will immediately begin finding connections to everything else in existence. Some of these connections are real. Some are imagined. None of them matter, because the act of connecting is itself the point.
Tunnel-Mouth Observations of hallucination
In the goblin underground, hallucination 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 codex
Goblin sleep researchers note that codex appears in dreams reported by their study participants at a frequency that cannot easily be explained, and which they are, for the moment, declining to explain at all.
The Goblin Verdict on signal
And, finally, in the matter of signal: the goblins thank you for your attention, decline to issue further comment, and request that you not lock the cellar door on your way out.