Did you not read my example with pie? Tell me how you are giving out 1 piece of pie in that example. It should be a pretty easy example to see.
You can't create something out of nothing. 0 and 0 are nothing, so you can't create 1 out of it. Note that that's not necessarily a great example because math probably can manage to create a number out of 0 using complex math, but using basic math, it does fit.
If you don't believe us, ask any math teacher.
