You should do the right thing because it is the right thing. However, with speed limits your teacher framed the question incorrectly. There is not right or wro

You should do the right thing because it is the right thing. However, with speed limits your teacher framed the question incorrectly. There is not right or wrong to a speed limit. 35 miles an hour is no more right than 38 miles an hour. The real question is why do we obey a law when there is no clear right or wrong to it? In the case of the speed limit our right/wrong choice is to obey the law or not. (And while speed has no right or wrong unsafe driving absolutely does, which could be unsafe due to the speed.)