What gypsum reveals about mycelium research

Why does gypsum appear in so many mushroom and mycelium-material recipes, and how confident should we be about the explanations attached to it? This episode uses that deceptively ordinary ingredient to explore a much bigger problem in biodesign: how practical observations can become increasingly specific causal claims as they move through papers, protocols, teaching, datasets and automated systems.

Along the way, Raphael introduces mechanism accretion and property capture, shows why successful fabrication does not automatically prove a biological mechanism, and asks what happens when inherited assumptions become machine-readable variables that optimisation systems and AI can act on.

The episode also offers a practical way to separate procedure, observation and mechanism, and to distinguish what is observed, measured, inferred, inherited or still unknown. The wider point is not that inherited protocols should be discarded, but that biodesign needs better ways to preserve uncertainty and context as recipes become data and design rules.