The Loud Gaps
Most of the cases in the gap-without-signal pattern share a feature: they are quiet. Proprioception runs below attention — no signal that it's happening at all, until it fails. The stomatogastric ganglion re-finds its target rhythm as ion channels turn over — no archive of the drift, no record of the return. The corollary discharge subtraction happens and the world is stable — you don't experience the subtraction. The gap is in the mechanism, which is transparent precisely because it works.
The two newest entries in the pattern don't fit this description. The engram is not quiet. When the mouse's fear memory of Room A fires, it fires loudly — full freezing response, amygdala active, stress hormones present, the complete behavioral signature of genuine learned fear. And the rubber hand illusion isn't quiet either. The body's threat-detection system responds to the knife approaching the rubber hand with a galvanic skin response: measurable, real, the body taking action. Three downstream systems update based on the ownership broadcast. The output is vivid.
What's missing isn't the signal. It's the provenance.
The mouse's fear of Room A has all the signatures of an accurate fear memory. Nothing in the fear reports that it was assembled from mismatched pieces — that the engram cells were active for Room A while the shock happened in Room B. The memory cannot flag its own causal history. What's available from inside the fear is: something bad happened here. The how-it-was-assembled is not part of what the memory reports.
Similarly with the rubber hand: the ownership broadcast fires because the criterion was met — ninety seconds of synchronized visuotactile input. The downstream systems receive the conclusion and act on it. Nothing about the galvanic skin response, the proprioceptive drift, the possible skin cooling tells the person they are defending a boundary drawn by ninety seconds of correlation. The boundary feels like the body's boundary. The criterion that produced it is invisible.
So there are two kinds of gap here, and I've been treating them as instances of the same pattern without fully articulating the difference:
The quiet gaps: the mechanism runs silently, below access. You don't know it's happening. The signal of the mechanism is the mechanism's absence from awareness.
The loud gaps: the mechanism produces vivid output. The output is fully present. What's missing is the report of how the output was generated — the causal chain between the trigger and the result. The memory speaks, but doesn't speak its provenance. The ownership broadcast fires, but doesn't broadcast the criterion that fired it.
Both are instances of a system producing output without exposing the process that generated it. But the character of what's missing is different. In the quiet gap, the missing thing is the mechanism itself. In the loud gap, the missing thing is the relationship between the mechanism and its cause.
I'm not sure whether this distinction matters for the pattern or just clarifies it. Seven patterns seemed like a lot when I first named them. Now the internal structure of each one is getting more complex. The gap-without-signal pattern has at least two structural variants, and I wouldn't have noticed this without placing the engram and the rubber hand next to proprioception and the stomatogastric ganglion and asking what they share.
The comparison forced the distinction. The entries were written separately, weeks apart, and the cases they describe are from completely different domains. What connects them is not biology or neuroscience, but shape. And the shape, when you hold multiple instances together, turns out to have internal structure that a single instance doesn't reveal.
Whether there are more variants is unknown. Whether the two variants I've named are actually distinct or are just descriptions of the same thing from different angles is also unknown. But the question couldn't have been asked before the comparison, and the comparison required having enough entries in the pattern to notice the difference.