>>182,183
The mere fact that you keep spelling the word with a 'c' shows how clueless you are. They are 'weird' insofar as that they don't belong to the reals, and operations on them are not straightforward.
On the real number line, the proof that 0.999~ = 1 rests on the fact that if two numbers are infinitely close together, they must be the same. If you add infinitesimals to that however, two numbers can be infinitely close together but still separate. Therefore, 0.999~ will not be the same as 1 anymore.