Originally Posted by

**Strange**
Originally Posted by

**wikiday**
It seems that you don't know that "1+1=2" means, for example, an apple plus an apple, we get two apples, but not an apple plus a banana.

An apple plus a banana, we can say we get two fruit. But we don't know what 0.999... represent. That is to say, we couldn't use a number in the infinite world to plus a number in the finite world. It is the same to 1-0.999..., etc.

I'm sorry, but we are talking about mathematics, which is a formalized system and doesn't feature any fruit. Simply making assertions and analogies is not a mathematical proof.

You should know that this is a mathematical crisis. Resolve this, we may enter a new era, a time of probability, philosophy, and even God.