MSc and PhD in Tectonics and Applied Structural Geology from Queen's and Carleton Universities respectively. Forty-five years of mapping across all crustal levels and scales (including microscopic). Thirty years of mentoring researchers and explorationists in structural geology that matters and increases hit rates. Keen on factual evidences rather than interpretative. At 6ias i will synthesize structural data collected in Rhyacian Greenstones and compare them to Archean Greenstones in order to demonstrate that not all thick lines on a map are faults of the same kind and that therefore they cannot be equally weighted in prospectivity analysis.