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Ohm's 'law' & minus sign

Has anyone else run into the Pedagogical Position which requires
Ohm's Law to be written with a MINUS sign?!?!?!?!

The justification seems to parallel the addition of the minus sign
known as Lens' Law in the EMF = - d(phi)/dt equation.

I need to be convinced, one way or the other. If it is as 'arbitrary'
as the Lens' Law sign, I'm inclined to leave it OUT!!!