Ismael Celis's name for a recurring failure mode in domain modelling. Starting from an ER diagram (campaigns, donations, notifications, etc.) and adding features (taxes, deductions, …) keeps adding nodes and relationships until the graph becomes the main source of coupling and complexity — making change hard. Entity-relationship diagrams describe structure but say nothing about behaviour (e.g. how to donate money). The talk's proposed complement: catalogue the operations (commands) and their resulting events as a timeline-based behavioural view — complementary, not exclusive, to ER modelling.