There are dozens of Markdowns flavors: Github Flavored Markdown Stack Exchange Flavored Markdown Markdown Extra LiaScript MultiMarkdown LeanPub Flavored Markdo

There are dozens of Markdowns flavors: Github Flavored Markdown Stack Exchange Flavored Markdown Markdown Extra LiaScript MultiMarkdown LeanPub Flavored Markdown Markua Python-Markdown Kramdown Even that is enough to show that Markdown is bad by design. But when you actually use it for any serious document, you face the bad design and struggle with the "easy" tool :)