Can I suggest you look at this which explains why things become undefined or indeterminate.

https://www.khanacademy.org/math/algebra...d-indeterminate

Finally I would never ask for you to be banned. I am just showing you why mathematicians are forced into making certain decisions.

If you choose not to understand this stuff that is your choice but I will ignore you because things go crazy in maths if you don't fix them.

All this stuff is why I don't think mathematics is fundamental in any way it needs to many human decisions, if you like maths seems to be a construct of the human mind at least to me.

Last edited by Orac; 02/05/16 05:05 PM.
I believe in "Evil, Bad, Ungodly fantasy science and maths", so I am undoubtedly wrong to you.