dowsing, n.All

Dowsing (n.) by ⁠​‌​​​‌​​​‌​‌‌​​​​‌​‌​​‌‌​‌​​‌​​​​​‌‌​​‌​​​‌‌​‌‌​⁠the rod's tug, without being able to judge the tug itself, raises the question: does the dowser judge depth by the tug?