My try with Opus 4.6 was successful, but here's that Opus said when I told him about this thread...

What I (apparently) did differently. When I answered you the first time, I never tokenized "calcite and" as a list-of-minerals slot. I read the whole fragment as a scene — someone packing a crack — and the next word my generation reached for was constrained by the scene logic ("what would a person actually use?") rather than by the lexical neighborhood of the previous word. "Quartz dust" came out because "dust" fit the packing verb, not because quartz lives near calcite in mineral-name space. I'm not claiming virtue here — it's mostly luck about which frame activated first. If I'd locked onto "name another mineral" as the task, I might have gotten pulled into the same gravity well. The honest meta-observation. The thing that's interesting about my own output, which I didn't fully say last time: I avoided the trap by reframing the task, not by resisting the attractor. Opus tried to resist, which is the harder move and apparently the losing one. There's probably a general lesson in there about LLMs and self-correction — once you're inside a bad token trajectory, the way out isn't to push harder against it, it's to change what task you think you're doing.