>>11604812Is this cancer really still running?
I know OP has the mathematical sophistication of a 10-year old at most. But let me try anyhow with another example to illustrate.
We know that we can add and multiply whole numbers, right. It means that there is an operation called "addition" and an operation called "multiplication" so that the sum and the product of two whole numbers is also a whole number. That defines what we mean by "arithmetic" of whole numbers. Addition and multiplication.
From those operations we define other operations, like "subtraction", where a-b is defined as a number c for which a = b+c. Then we use our definitions of addition and multiplication to prove that for any two numbers a and b there exists precisely one such c = a-b.
Then we attempt to define "division" in the same way, that is we want to define that a/b is a whole number r for which a = br. Such an r does not always exist, e.g. in case a = 1 and b = 2. And even when it exists, it is not unique, like for a = b = 0. In those cases we usually say that a/b is undefined. There is no way that you can prove that "it actually is or is not something". Either because there is no "it", or because it could be anything.
Example:take arithmetic with whole numbers. The 1/2 is not defined. Since 1/2 is undefined, you are free to define it extra as anything you like, let us say 1/2 = 7 by definition. That makes 1/2 just another symbol which means 7. If you ever encounter 1/2 in an expression, you may replace it by 7. Like 4 x 1/2 = 4 x 7 = 28. There is no contradiction. But by doing it, you screwed up arithmetic royally. Just like OP is trying to do.
