When "studying" Unicode specifications I came across Carl Henderson's remarkably clear and concise illustration
of understanding bidirectional text.
I extracted the .html from his page and I created a .mobi and a .azw3 to test the capabilities of my Kindle Keyboard v3.4. The expected behaviour is explained in the text along with coding and rendering examples, greatly enhancing the comprehension.
The subject is relatively complex and certainly not trivial.
(I think) I *do* understand it now
(?)... So can you! Hoping you find it useful to test other browsers and ereaders.
I have identified the following rendering errors
(I think) . And I would appreciate if a dedicated and applied reader interested in this subject could confirm my understanding.
When Adobe Acrobat XI Pro v11.0, Firefox v20.0.1 or Microsoft Internet Explorer v10.0 render the .html
The
"implicit marker, third case"

Can all these good software be doing that same error?!
After converting the .html to .mobi with Kindle Previewer v2.85, to .azw3 with Calibre 0.9.27 and viewing them in my Kindle Keyboard v3.4
The
"implicit marker, first case"
Open my test files below to better see what I mean: