A particular advantage to intuition comes with the famous e=mc^2. Since c is 1, and 1^2 is 1, e=m. That is clever, but you've already adjusted the mass to take

A particular advantage to intuition comes with the famous e=mc^2. Since c is 1, and 1^2 is 1, e=m. That is clever, but you've already adjusted the mass to take into account the fact that you are now setting c=1. This reminds me of computer programming where, for the sake of an easy-to-read clarity, I decide to take one line of code and make it two. Basically, instead of doing this: e=mc^2 You have decided to make it two lines of code: m=mc^2 e=m I often do that, especially if I'm working with junior devs and I want the code to be as easy as possible for them to read (90% of the time). It's clever, but everyone should remember the assumption that allows this: the mass has already been adjusted to reflect the reality that of c=1.