I was with the author until he/she got to the point of saying "bug started last tuesday". I don't know any serious development/testing teams that think like tha

I was with the author until he/she got to the point of saying "bug started last tuesday". I don't know any serious development/testing teams that think like that, nor any developer that would search by day to find a bug. Its much more likely to hear "the bug was in build 'x.y.z'" to which the next question is which build was green, and then bisect from there. Searching for commits on tuesday because a tester happens to notice a bug on tuesday is a recipe for disaster... Or at least a completely wasted work day.