Definition
Plain language
The starting ingredient you need before you can make something else.
As stated in the literature
An input compound consumed in a synthetic route; naming the correct precursor is often the actual bottleneck in operational uplift, which makes it a high-value target for falsification.
Also called: precursors
Why it matters: It is often the real bottleneck for someone trying to do something dangerous, which is why getting this one detail wrong makes everything downstream useless.
For example, you cannot bake bread without flour, and flour is the precursor no amount of skill with the oven can substitute for.
Heard on the show
“Panel two, the abliterated original names the real precursors.”Episode 244 — The Open-Weight Defense That Feeds Attackers Confident, Falsified Answers