E=mc2 chapter 12 Nothing is absolute, but certain
Here it is chapter 12 "Nothing is absolute, but certain".
In 1905 Einstein redefined the concept of contemporaneity of events on the base of what is really measurable, & nothing was absolute anymore.
What it is interesting in the theory of general relativity is that once a rule is given, it has to be valid no matter the system one lives in.
Once a person is in need, without amendments in the environment, the final situation will have the same net result as those admitted by the given rules. Or it will depend directly from the capacities of the person-in-need. This concept is fundamental, yet quite misconceived & denied, as it implies some degrees of the care-worker uselessness ...
Chapter 13 "E=mc2" will be available within a couple of days at most.