Can we, in principle, consider electrons as positive charges and protons as negative charges? How would our laws change if that was the case? Do you guys think that the convention of choosing electrons as negative charges and protons as positive changes was a mistake? Do we really need the concept of plus and minus? Can't we just get along fine with "bill" and "bob"? For example, two bills will repel each other and a bill and a bob would attract each other? Also, is it possible to eliminate the concept of plus/minus from physics? Just like we eliminated negative temperatures (in the Celcius scale) by creating a new scale (the Kelvin scale) that only had positive temperatures.