Class field theorists do it by capitulation. Classical geometers do it with a straight edge. Classical geometers do it from the right angle. Combinatorists do it discretely. Combinatorists do it as many ways as they can.
Commutative algebraists do it regularly.
Complex analysts do it between the sheets. Complex analysts do it under a universal cover. Complex analysts do it with imaginary parts. Computer scientists do it depth-first. Constructivists do it without excluding the middle.