!!!Test Cases
Test if this works in your wiki. If not, your implementation has a ambiguity problem (or the creole spec has to be more clear about it!).

{{{
**bold text**\\
 ** bold text**\\
** bold text**\\

* first level
** second level **bold text** or ** with space**
*** third level
** **second level beginning with bold**
**second level with no space (see [Creole:Require Space After Bullet Proposal])
** this text does not close, see what happens ** not closing
* first level
}}}

Would dashes solve the problem?
{{{
**bold text**\\
 ** bold text**\\
** bold text**\\

- first level
-- second level **bold text** or ** with space**
--- third level
-- **second level beginning with bold**
--second level with no space (see [Creole:Require Space After Bullet Proposal])
-- this text does not close, see what happens ** not closing
- first level

--This is a Signature
also this could be a --signature, after that theres a horizontal rule
----

10
-15 (this should not work, it's an edge case, you have to escape it with a space before...
= -5 (this sould not work, first level heading!

10
 -15 (this should work now)
 = -5 (this should work now)

and this should work as well
{{{
10
-15
= -5
~}}}

----
}}}